I was wondering what would be more powerfull, 2x 8800 gt's or i dont know... one of the newest best of the best? By the way what is the current best graphics card out there?
I'd avoid SLI - it requires using an SLI motherboard, which aren't usually very good, and SLI is a rather finicky technology, with numerous bugs and flaws. I'd recommend you wait until the new GT200 series cards come out and get one of those.