I'm personally a fan (read: fanboy) of Asus. Their cards tend to be a little more pricey though. I actually own a Gigabyte 6950 that runs great though I can't seem to find them online anymore. Typically what people will tell you is to find which company offers the best warranty, and that's good advice. The cards are basically the same, and any card that offers a factory OC offers an OC that you can easily achieve on your own anyway.