I say the PowerColor X800 GT is a really good performance for its price, something like $150 on newegg for the PCI-e, however for AGP its around 200
it wouldve been the card i got if the pricing of the AGP was closer to that of the PCI-e, however it is a very good card, my roommate has one while the other has a 7800GT and performance of the X800 GT performance does not differ to much from the 7800GT in the games we play, ie. BF2, quake4, FPS...
here's a link to a review from firingsquad:
http://firingsquad.com/hardware/powe...adeon_x800_gt/