Get one with a good warrantee, eVGA is a good choice. I say this for two reasons:
1) The 7900GT's appear to be a crap shoot... Some are awesome, but there seem to be a few bad ones in the bunch. With a company like eVGA, it's just an inconvenience if you get a bad card though, since they will replace it with no hassle.
2) I'm learning the warrantee lesson the hard way... I recently bought a defective HIS X1900XTX, and their "1 year warrantee" isn't much to speak of... Fisrt of all, they don't actually do their own RMA, I had to RMA my card (after having to find out who it was) to the HIS American distributor for Monarch Computers. They've given me an RMA number and I've sent my card in, and I haven't heard a peep out of them for almost 2 weeks now... If this was an eVGA card, I'd have gotten my replacement a week ago. I will never buy HIS ever again.
...didn't AT used to include customer service/support as part of their product reviews..? Whatever happened to that?