Which 6600GT PCI-E Video Card?

[Paradigm]

I just purchased the Asus P5AD2 Premium board with 1gb of Crucial Ballistix DDR2 and a P4 3.4 CPU but have not decided on a video card. The 6800 series is a little out of my price range for what I want to spend on a video card. And gaming is not my primary use of the rig. So I am looking at the 6600GT pci-e series of cards in the 200 dollar price range.

Does anyone have any recommendations on which one to buy that also has good overclocking ability? All opinions and recommendations are welcome.

Thanks!