The U2412M. Dell's budget IPS screens are superb for text and pictures.
Black Web pages with text & faded pictures like http://thief.wikia.com/wiki/Garrett look stunning.
It's a flicker-free screen. I have the blue channel at 36%, red and green 52% to create a low-blue-light mode with the brightness at 20-35%. The blue colors still look good enough. The sharpness is set at 100%.