i've been considering buying the sli mobo and one 6800gt. later another one, in order to keep up with future games. however i was reconsidering the idea of spending $900 of gpu's and 200 for mobo. the reasoning is that after 5-6 months when i am ready to buy another 6800gt there might be the whole diferent generation cards out there and even two $900 gpu's wont keep up with $500 new gpu. in short, is the play and visuals are so improved with sli that an average guy like me can see the difference and be proud of $1200 spent on the sli setup? or is it just the same as runing 6800 ultra on neo2 platinum?