Really if you think about it, it's almost exactly like the GF7800Ultra/GTX-512.
Buy two GF8800GTS-640s and put them in SLi and it should stomp a single GF8800Ultra for the same price.
I'd say forget the GF8800Ultra stick with whichever GF8800 you have (or if you don't, then go out and buy the GTS-320 right now) and then put the rest of the money in the bank, earn interest, take money out, spend interest on ice cream cone, and then buy the refreshed 65nm part when it arrives instead of the Ultra.
Better card plus ice cream; can't go wrong with that !! MMMmmm mmmMMM !!! :mrgreen: