Our editors evaluated 3 Monitor options against the criteria readers actually weigh up: price, real-world performance, build quality, warranty, and UK availability. Picks lean toward what we'd recommend to a friend buying today, not specs-on-paper winners.
Hands-on contextEditor notes from individual reviews, not press releases.
Live UK pricingRefreshed from Amazon UK twice daily.
No paid placementsAffiliate commission doesn't change what wins.
Finding the best LG monitors under £400 is trickier than it sounds. LG makes a huge range of screens, and even within a tight budget you are choosing between very different philosophies: a feature-loaded ultrawide built for productivity, a curved VA panel aimed squarely at value and gaming, and a 4K smart monitor that doubles as a standalone entertainment hub. These three cover that ground completely. The LG 34BA75QE sits at the top of the budget at £399.00, the LG 34WR50QK comes in at £205.00, and the LG 27U731SA-W lands at £199.00. That is a meaningful price spread, and the differences in what you get are just as meaningful. Here is exactly how they stack up.
Display Quality: Which LG Monitor Has the Best Picture?
Winner: LG 27U731SA-W
Resolution is where the LG 27U731SA-W immediately separates itself. At 3840x2160 on a 27-inch screen, you get a pixel density of around 163 pixels per inch. That is noticeably sharper than the 3440x1440 panels in both ultrawide options, which land at roughly 109ppi on their 34-inch screens. Text is crisper, fine detail in photos is more visible, and UI elements look cleaner. If you do any photo editing, design work, or just spend a lot of time reading, that difference is real and daily.
The IPS panel in the 27U731SA-W also delivers solid colour accuracy and wide viewing angles, as you would expect from LG's IPS technology. HDR10 support is present, though like most monitors at this price the peak brightness is not high enough to make HDR transformative. Still, it handles the spec correctly.
The LG 34BA75QE also uses an IPS panel with HDR10, and its 3440x1440 resolution is genuinely good for productivity. The extra screen width is useful for multitasking, and IPS colour accuracy means it is fine for colour-sensitive work. But at 109ppi it simply cannot match the 27U731SA-W for sharpness.
The LG 34WR50QK is the most interesting case here. Its VA panel delivers a contrast ratio closer to 3000:1, versus the roughly 1000:1 you get from IPS. In a darkened room, blacks look properly dark rather than slightly grey. That is a genuine advantage for film watching and dark-themed gaming. But VA panels can show colour shift when viewed from an angle, and the 34WR50QK has no HDR10 support at all. For colour accuracy and versatility, it sits behind the other two.
So: the 27U731SA-W wins on resolution and pixel density. The 34WR50QK wins on contrast. The 34BA75QE is the most balanced IPS performer. For pure display quality across most use cases, the 4K IPS panel in the 27U731SA-W takes it.
Refresh Rate and Gaming Performance: Which Handles Motion Best?
Winner: LG 34WR50QK
This one is not close. The LG 34WR50QK runs at 100Hz. The other two are both 60Hz. That is a 67% increase in frames per second, and in motion-heavy content, whether that is gaming, fast video, or even scrolling, you feel it.
At 100Hz, the 34WR50QK can display up to 100 frames per second, which means games that push above 60fps actually benefit from the higher refresh rate. Cursor movement feels smoother, and fast-paced games like shooters or racing titles look noticeably cleaner. The 1500R curve also helps here, pulling the edges of the 21:9 screen slightly closer to your peripheral vision, which adds to immersion in games.
The 5ms response time is shared across all three monitors, so there is no meaningful difference there. But response time and refresh rate are different things. A 60Hz monitor at 5ms still only updates the image 60 times per second. The 34WR50QK updates 100 times per second, which is what actually reduces motion blur in practice.
For the 34BA75QE and 27U731SA-W, 60Hz is fine for productivity and casual use. Most people working in spreadsheets or on video calls will never notice the difference. But if you game even occasionally, the 34WR50QK's 100Hz panel is a meaningful upgrade that neither of the other two can match at any price in this group.
Connectivity and Ports: Which Monitor Offers the Most?
Winner: LG 34BA75QE
Here is where the LG 34BA75QE completely runs away from the competition. Look at what it includes: USB-C with 90W power delivery, DisplayPort 1.4, HDMI, a wired LAN port (RJ45), a USB hub, and a built-in KVM switch. That is a proper docking station built into a monitor.
The 90W USB-C is enough to charge a MacBook Pro or most Windows laptops while simultaneously carrying the display signal. One cable from your laptop to the monitor handles everything. The KVM switch lets you connect two computers and switch between them using a single keyboard and mouse, which is a feature that normally costs extra in a separate KVM box. If you work from home and use both a personal machine and a work laptop, this is genuinely useful every single day.
The wired LAN port is a nice touch too. If your desk is away from your router, you can run an ethernet cable to the monitor and the monitor passes the connection through to your laptop via USB-C. No Wi-Fi dropouts during video calls.
The LG 34WR50QK, by contrast, has HDMI and DisplayPort. That is it. No USB-C, no USB hub, no LAN. Fine for a gaming monitor, but not for a productivity setup where you want to reduce cable clutter.
The LG 27U731SA-W has USB-C and HDMI, plus Wi-Fi and Bluetooth built in (which the other two lack entirely). The wireless connectivity is useful for AirPlay and the smart platform, but for wired productivity use it cannot match the 34BA75QE's port selection.
If connectivity matters to your workflow, and for most home office workers it does, the 34BA75QE is in a different league.
Smart Features and Software: Does the webOS Platform Deliver?
Winner: LG 27U731SA-W
The LG 27U731SA-W is the only monitor in this group that does anything interesting without a computer attached. It runs webOS, the same smart TV platform LG uses across its OLED and QNED television range. That means Netflix, YouTube, Disney+, and other streaming apps are available natively. You can watch content without a PC, games console, or streaming stick.
AirPlay 2 support means iPhone and Mac users can mirror or cast content directly to the screen wirelessly. Bluetooth lets you pair headphones or a speaker. There is also a Remote Desktop feature, which lets you access a Windows PC remotely over your network, useful if your main machine is in another room.
The 27U731SA-W comes with a remote control, which is a detail that sounds minor but actually matters when you are using it as a standalone entertainment display. Navigating webOS with a remote is far more comfortable than using monitor buttons.
The LG 34BA75QE and LG 34WR50QK have none of this. They are standard monitors that need a connected source to do anything. The 34BA75QE has LG's OnScreen Control software for adjusting settings from your PC, and the 34WR50QK has Smart Energy Saving, but neither comes close to the 27U731SA-W's standalone capability.
If you want a monitor that doubles as a smart display for a bedroom, kitchen, or small living space, the 27U731SA-W is the only option here that makes sense. The other two are purely desk monitors.
Ergonomics and Build Quality: Which Stand Is Actually Usable?
Winner: LG 34BA75QE
Stand quality is one of those things that sounds boring until you spend eight hours a day at a desk and your neck starts complaining. The LG 34BA75QE has height adjustment, tilt, and swivel. You can raise or lower the screen to match your eye level, angle it left or right to share with a colleague, and tilt it back or forward. That is a full ergonomic stand, the kind you would expect on a business-grade monitor.
The LG 34WR50QK has tilt only. You can angle the screen back and forward, and that is your lot. If the stand height does not suit you out of the box, you are buying a monitor arm. The build quality of the 34WR50QK is decent for the price, but the stand is clearly where costs were cut.
The LG 27U731SA-W also offers tilt only. Given its positioning as a home office and smart display, the lack of height adjustment is a bit of a miss. Again, a monitor arm solves it, but that adds cost and complexity.
For a monitor at £399.00, the 34BA75QE's full ergonomic stand is expected and delivered. For the 34WR50QK at £205.00, tilt-only is understandable. For the 27U731SA-W at £199.00, it is a minor frustration given the home office focus.
Build quality across all three is solid LG construction. No flex in the panels, decent cable management channels, and the usual LG fit and finish. But the stand situation makes the 34BA75QE the clear winner for anyone who cares about long-term comfort.
Screen Size and Format: Ultrawide vs Standard 16:9
Draw: Depends on your use case
This is genuinely a matter of what you need rather than which is objectively better. Both ultrawide monitors, the 34BA75QE and the 34WR50QK, run at 21:9 aspect ratio with a 3440x1440 resolution. That extra horizontal space is real. You can have two full-size windows open side by side without either feeling cramped. Spreadsheets, code editors, and video timelines all benefit from the width.
The LG 27U731SA-W is a standard 16:9 monitor at 27 inches. It is smaller and more conventional. But 4K at 27 inches is a genuinely good combination. The pixel density is high enough that you can run the display at native 4K and have everything look sharp, or scale it slightly and get more usable desktop space than the ultrawide monitors offer in terms of vertical pixels.
Here is the practical split: if you multitask heavily and want everything visible at once, the ultrawide format is better. If you work with high-resolution images, video, or just want the sharpest possible text and UI, the 4K 27-inch is the better call. Neither format is universally superior.
The 34WR50QK's 1500R curve is worth mentioning. On a 34-inch screen, a gentle curve does help the edges feel less distant, particularly in gaming. It is not dramatic, but it is noticeable. The 34BA75QE is flat, which some people prefer for productivity work where straight lines matter.
This one is a draw because the right answer depends entirely on your workflow. Both formats are well-served in this group.
Value for Money: Which LG Monitor Gives You the Most for Your Budget?
Winner: LG 34WR50QK
Value is always relative to what you need, but on a pure specs-per-pound basis, the LG 34WR50QK is remarkable. At £205.00, you get a 34-inch ultrawide VA panel at 3440x1440 with 100Hz refresh rate and a 1500R curve. That is a lot of monitor for the money.
Compare that to the LG 34BA75QE at £399.00. The price difference is substantial. The 34BA75QE justifies it with the KVM switch, 90W USB-C, LAN port, full ergonomic stand, and HDR10. Those are real features with real value for the right user. But if you do not need a KVM switch and you are not running two computers from one desk, you are paying a significant premium for features you will not use.
The LG 27U731SA-W at £199.00 is also strong value. A 4K IPS panel with webOS, AirPlay, Wi-Fi, and Bluetooth at that price is genuinely competitive. For what it does, it is priced fairly.
But the 34WR50QK is the one that makes you do a double take. A 34-inch 100Hz ultrawide for that price is the kind of deal that makes the other two look expensive by comparison. Yes, the stand is basic. Yes, connectivity is minimal. But the screen itself, which is what you are actually looking at all day, is excellent for the money.
For users who want the most screen for the least spend, the 34WR50QK wins this category clearly. For users who need the productivity features, the 34BA75QE's premium is justified. The 27U731SA-W sits in a comfortable middle ground.
You work from home and need a proper docking station setup. The KVM switch, 90W USB-C, and wired LAN port are features that genuinely change how your desk works.
You use two computers from one desk. The built-in KVM switch saves you buying a separate box and keeps cable clutter down.
You want a full ergonomic stand. Height, tilt, and swivel adjustment matters if you spend long hours at a desk and want to get your eye level right.
You need HDR10 support on an ultrawide IPS panel and are willing to pay for the full package.
Buy the LG 34WR50QK If:
You want the biggest screen for the least money. The 34-inch ultrawide at this price is genuinely hard to beat in the UK market.
You game casually or regularly. The 100Hz VA panel is the only option in this group that goes above 60Hz, and it makes a real difference in motion clarity.
You watch a lot of films or dark-themed content. The VA panel's deeper contrast ratio makes dark scenes look better than either IPS option.
Your budget is tight and connectivity is not a priority. HDMI and DisplayPort cover most setups.
Buy the LG 27U731SA-W If:
You want 4K resolution and the sharpest possible image for photo editing, design work, or detailed content.
You want a monitor that works without a PC. The webOS platform, AirPlay 2, and streaming apps make it a standalone smart display.
You are an Apple user. AirPlay 2 support and Bluetooth make it the most Mac-friendly option in the group.
You want a versatile screen for a bedroom or secondary space that handles both work and entertainment.
How We Researched These Monitors
We do not fabricate hands-on testing we have not done. What we do is dig into the specs carefully, cross-reference manufacturer data with independent panel measurements from sources like RTINGS, and read through verified owner feedback on Amazon UK to understand real-world performance patterns. For these three monitors, we paid particular attention to connectivity specs (which are often misrepresented in listings), panel type differences between IPS and VA, and the practical implications of refresh rate for different user types. Price comparisons use live Amazon UK data via our shortcodes, so figures reflect current pricing rather than launch RRP. We also checked LG's own product pages to confirm specifications where Amazon listings were ambiguous.
Final Verdict: Best LG Monitors Under £400
The best LG monitors under £400 cover genuinely different ground, and the right choice depends heavily on what you actually do at your desk. The LG 34BA75QE is the best overall monitor of the three. Its combination of KVM switch, 90W USB-C, wired LAN, full ergonomic stand, and HDR10 IPS panel makes it the most complete productivity monitor in the group, and for home office workers who run two machines from one desk, nothing else here comes close. The LG 34WR50QK is the best value pick if your budget is tighter or gaming is part of your plan: a 34-inch 100Hz VA ultrawide at its price is exceptional, even if the stand and connectivity are basic. And the LG 27U731SA-W earns its place as the best budget option for anyone who wants 4K sharpness and smart platform versatility in a single box, particularly Apple users who will get real use from AirPlay 2. If you can stretch to it, the 34BA75QE is the monitor we would recommend for most people searching for the best LG monitors under £400. But none of these are bad choices, and each one is the right answer for a specific type of buyer.
Frequently Asked Questions
Yes, LG offers 4K monitors under £400, though they are typically 24 inches. Models like the 24UP550 provide 3840x2160 resolution with excellent colour accuracy at this price point. If you need larger 4K displays, you may need to stretch your budget slightly.
The LG 27GN950 and 27GP850 are excellent gaming choices, offering 1440p resolution with 144Hz and 165Hz refresh rates respectively. Both feature fast 1ms response times and IPS panels for better colours than older gaming monitors, providing a good balance between gaming performance and general use.
IPS panels offer superior colour accuracy and wider viewing angles, making them better for creative work and everyday tasks. TN panels provide faster response times and are cheaper, traditionally preferred for gaming, though modern IPS panels now offer competitive refresh rates. For versatility under £400, IPS is generally the better choice.
Some models like the 24UP550 and 27UP550 include USB-C with power delivery, allowing you to charge and connect a laptop with a single cable. However, not all budget models feature USB-C, so check specifications if this is important for your setup.
24-inch monitors offer 4K resolution but less workspace, ideal for detail-focused work. 27-inch monitors typically max out at 1440p but provide more screen real estate for multitasking. Choose based on your desk space and primary use case rather than pursuing 4K if you need larger displays.
