Go with the Leadtek or eVGA. Both look to be a good choice. I second the notion of kicking it up one more notch for a 6800NU (That's the base 6800, no letters or words after it. NU stands for Non-Ultra) which you can probably get for $250 or so if you look around. But if the 6600GT is pushing your budget limits, splurge on that and you should be happy. From what I've read, the 6600GT takes anything from last year's card series (9xxx from ATI, and 5xxx from NV) to the house Just make sure you get AGP if you have an AGP board (assuming you do).