dhw200 said:matter of opinion. I have a friend with a 6800 GT, and it looks better than another friend with a pair of 6600 GT's. The 6800GT looks better, i think. But then again, the guy with the 6600 GT's was about the 1st person to get SLi, so his is really buggy.
What are your friends playing? Super ultra rez at 2048*whatever? If you play on 1024*768 it won't make a difference because 6600GT can handle most if not all games at that rez and at high AA and AF (to tell you the truth AF doesn't cause that much stress on the GPU).
Senseless is right, the 6800GT image quailty is NOT worth an additional $200.