A general useful link to go to when picking a GPU is the Tom's Hardware Graphics Card Hireachy.
Lists most cards back to the Nvidia TNT and the Rage 128 in order of performance.
That being said, it doesn't take into account fanboyish tendencies, overclocking, price or any factor like that.
http://www.tomshardware.com/reviews/geforc...970,2491-7.html