Are you itching for SLI? What's your budget? If not going SLI immediately then don't upgrade at all. If going IMMEDIATELY, then buy what your budget can afford. Last I looked, the 7 series was around $300 while you can get a 680i for $160-250 and a 650i SLI for around $100. Also, would you be going 45nm quadcore? If so, then 780i is your daddy!