Oh man, I didn't even see the 1GB Version of the card, and funny its only like 60 bucks more, thats a done deal for that.
Changed out the board to
ASUS M3A79-T Deluxe AM2+/AM2 AMD 790FX
Which is 4x crossfire and at least two are x16 slots minimum.

Still trying to figure out, which copy of vista to run with ? Premium? ultimate? Basic ? I dont want to screw myself over with the windows domain stuff.