dont even think aboutthe X1950xt their hella expensive and are totally knocked out of the water by the 7950 gx2 let alone the 8800 series, the 7950 gx2 doesnt have dx10 but has almost as good fps as the 8800 gts and even better in some games so the 7950 gx2 isnt overpriced, and also be reminded that you only use 1 pci with the 7950 gx2 so it is possible for quad sli