You're better off waiting a couple weeks and grabbing an x1950xtx. I think price/performance wise its a bit more compelling than the 7950, not to mention the fact that it can do AA and HDR at the same time. Plus, the 7950 requires SLi profiles in order to take maximum advantage of both GPUs, and these profiles sometimes take awhile to mature as new games come out.
ok so lets say that i get the x1950xtx di i have to have a crossfire ready motherboard or can ya run it with any board with 2 pci X slots runing at 16X say the new board that asus is coming out with in the next few weeksit is trut 16X sli ready motherboard specificaly for sombody wanting to run 2 sli cards.??? would i be better off geting the 7900GTX and adding another for the sli support???