I thought the MSRP of 7900GTX were $499? high demand? availibility problems?
Anyhow, you could consider the new 7900GT CO from EVGA. The cooler covers the Vrams, and its all copper too. Looks nice. Clocked at 550/1580 i believe it was.
Unless you want some "coolness" on your cards like BFGs "OMGWTFBFG SAUCE" or "MY BIG FKN GUN" sticker, you cant go wrong with either company. BFG comes pre OCed 20mhz on core and memory. But same cooling etc.