single 8800 gts 320 faster than 2x 7800GT sli?

I saw that this is coming out soon, and I dont want to spend the $$$ on the current GTS right now, but I have a 7800GT SLI setup at the moment. (yes I am aware I have more total video memory right now)

Depending on what resolution you run at, you should be fine.
Also the 320 is more memory than what you have right now, since both cards have to be filled with the same exact stuff, so you only really have 256mb (if the 7800gt is a 256mb card, if they are 512s then ignore me )

Also right now just best to wait and read the reviews on them and make up your mind for yourself :3

It will be better... But not by THAT much. 1 7800GT to a GTS resulted in a 112% FPS boost for me in Oblivion, I'd expect going from 7800SLI to a GTS320 should result in a 25-30% boost.

But, we'll have to wait and see really.

8800GTS will be signifigantly faster in some games, but will always be at least a bit faster, than your 7800GT SLI.