Pineapple20,
I've been looking for a good 2560 X 1440 to replace a 1920 X 1080 / I've only seen this in the shop, but it looked very good, has good controls plus tilt, swivel, pivot, and height, and has generally been favorably reviewed. I should mention I judge monitors entirely on work-related qualities CAD, rendering, photo editing, and text) plus the ergonometrics- controls and stand. I really dislike silly-fussy controls requiring pressing five different buttons thirty times to change the contrast and exit the menus. Also stand wobble, I like it not.
Anyway, here are some I've been considering:
Asus PB278Q WQHD LED Professional IPS Monitor HDMI 1.4/DP/DVI 2560x1440 > £419.99
http://www.scan.co.uk/products/27-asus-pb278q-led-monitor-pls-hdmi-dp-dvi-2560x1440-300cd-m-80m1-5ms-speakers-black
Also, the Dell Ultrasharp is very good, although I find the anti-reflective coating to give these a kind of pebbly, whitish quality if there's light on them and every model seems different in this regard. I'm used to an HP without any anti reflective coating and for me the intensity and clarity is preferable.
Sorry, a bit over the budget:
Dell U2713H LED AH-IPS Monitor with Dp/mDP/HDMI/DVI Tilt Height Pivot 4Port USB 3 > £527.12
http://www.scan.co.uk/products/27-dell-u2713h-led-ah-ips-led-monitor-displayport-hdmi-vga-2560x1440-2560x1440-350cd-m2-10001-6ms-us
A couple more choices:
Samsung SD850 S27D850T (27 inch) WQHD Professional Monitor 1000:1 350cd/m2 2560x1440 5ms DisplayPort/HDMI/DVI >£460.08
http://www.amazon.co.uk/Samsung-SD850-S27D850T-Professional-Monitor/dp/B00M8XQ93E/ref=sr_1_2?ie=UTF8&qid=1415481225&sr=8-2&keywords=SAMSUNG+S27A850D
ViewSonic VP2770-LED 27 inch Widescreen HD High Resolution Professional Monitor Price: £421.94
http://www.amazon.co.uk/ViewSonic-VP2770-LED-Widescreen-Resolution-Professional/dp/B00906HNZU/ref=sr_1_1?ie=UTF8&qid=1415481084&sr=8-1&keywords=ViewSonic+VP2770
I find monitors the most difficult decisions and I always see them in person to have a sense of the image quality, the controls, the stand adjustments and so on. Specifications don't communicate much and reviews are subjective and often conflict. I think though my choice is gravitating towards either the ASUS or Samsung.
Cheers,
BambiBoom
HP z420 (2014) > Xeon E5-1620 quad core @ 3.6 / 3.8GHz > 24GB DDR3 ECC 1600 RAM > Quadro 4000 (2GB)> Samsung 840 SSD 250GB /Western Digital Black WD1003FZEX 1TB> M-Audio 192 sound card > AE3000 USB WiFi > HP 2711X, 27" 1920 X 1080 and Dell 24" 1920 X 1080> Windows 7 Ultimate 64 >[Passmark system rating = 3923, CPU= 9223/ 2D= 839 / 3D=2048]
Dell Precision T5400 (2008) > 2X Xeon X5460 quad core @3.16GHz > 16GB DDR2 ECC 667> Quadro FX 4800 (1.5GB) > WD RE4 500GB / Seagate Barracuda 500GB > M-Audio 2496 Sound Card / Linksys 600N WiFi > Dell 24" and Dell 19" LCD > Windows 7 Ultimate 64-bit > [Passmark system rating = 1859, CPU = 8528 / 2D= 512 / 3D=1097]
Dell Precision 390 (2006) Xeon x3230 quad core @ 2.67GHz > 6 GB DDR2 ECC 667 > Firepro V4900 (1GB)> 2X WD 320GB > 2X Dell 19" LCD > Windows 7 Professional 64-bit [Passmark system rating = 1458, CPU = 3642 / 2D= 433 / 3D=1346]
2D, 3D CAD, Image Processing, Rendering, Text > Architecture, industrial design, graphic design, written projects