7950GT - fanless
Quiet and fast. I will never again make the mistake of buying a top-end video card with a fan. You will enjoy it, too. You won't have the fan constantly going up and down in RPM when you're using Compiz Fusion -- it gets annoying on a card with a fan.
ET: QW runs very well on max settings on my 7950GT fanless.
I also don't use Windows, so DirectX 10 is also meaningless to me, and I'm not worried about future support for about a year.
Edit: It retails now for $200, but since they are hard to find right now... I'll help you out.