i am using the 71.80, and they seem pretty good. They are the only 71.xx drivers that have the "yellow water" HL2 bug fixed. Performance seems pretty good. Performance is pretty even around the board on all the drivers, but i think that newer drivers have gotten some decent gains in games like Doom3 and HL2. Since HL2 is the most demanding game I have, i chose to use the 71.80s. Currently, playability is good at 1280x1024 4xAA/8xAF on my 6600GT (545/1090) and A64 3000+ (2.25GHz), so that should give you an idea.