i need to buy an 8-bit gaming capable lcd

hi everyone i just built a new gaming/multimedia rigg and now i am looking for a lcd monitor with true 8 bit color and responce time good enough for gaming.

im looking for anything that is 19" or 20" inch viewable it doesnt have to be widescreen but would be a plus. and a native res that wouldnt be so hard on my videocard when dx10 games come out.

my price range is 0-500$

the only monitor that came close was NEC Display Solutions 20WMGX2 but i think it's over priced.

i need all the help i can get thank you!

here are my pc specs:
cpu-e6600 @ 3.0
mobo-evga 680i
videocard-evga 8800gts
ramz-corsair xms2 2gb PC2 6400
psu - MSI TurboStream 650watts GE
HDD - Western Digital Caviar 16mb cache 250gb
cooling - ZALMAN CNPS9500 hsf