I am building a new rig and my video card choice is holding me up. I have the HP w2408 monitor and I want to game at its native resolution. Soulf I get 1 8800gts 320mb or 1 8800gts 640mb or 1 8800 gtx. then theres sli, should I sli 2 of the gts's or just get 1 gtx. I am hesistant about getting an 8800gtx because I am nervous that a newer, better, acrd will be out soon? What should I do?