I'm personally waiting for the 512MB 7900GTs--when overvolted and watercooled, I should be able to hit 800+ relatively easily [core].
The 512 of memory will come in handy with games down the road, and a few games currently [Oblivion]
Might not clock quite as high [memory], but I don't think I'll be bandwidth handicapped
Sure, I'll fork out an extra ~50 bucks. BFD. >
Or I could just grab a GTX right now and get the 512 thataway.
Though, thinking on it some more, DX10 hardware will be out soon...
--Trevor