i got the sapphire ATI X1600XT for about 100 bucks on Newegg and it seems to be doing fine, i dont really game so i cant tell u how it is with that but the games i have played it does great
If you’re willing to risk a rebate this 7900GS might be something to consider. My review of the PNY Verto 7900GS should give you an idea of what kind of performance you can get out of such a card.