I say the 8800GT.. You get more for... more money
Who in their right mind looks at graphics cards and wonders "Geez, which one will give me the best performance for my dollar?" You should say "Ok so my budget is $XXX what card will give me the BEST performance for what I'm willing to spend?"
Yeah, I agree. Or also the "I want to play these
games at this
native resolution, which would be the best use of my money?" I think moreso than CPU, GPU you have to look into more variables than best just general bang for buck.