You need to buy monitors only on PVA or IPS matrixes. These are the following 17" models w/DVI : Samsung 171P, 172T, 173T, 173P, IIyama H430, Eizo L565, L557, Dell w/corners 170 degree only. At them the present 24-bit color.
NEC 1760NX, LG 1720, VS 171B/P - all this on TN matrixes. They for games, quality of a picture and corners bad. 18-bit + dithering.