I picked that mobo because it could do to way xfire if you ever wanted it to and is almost $100 cheaper. Arguably it is better than that asus one as well, since it has 2 3.0@x16 while the asus one has 2 at x8. Also, you could sli with that 650w, my brother has had no problems sliing 2 6950's with a 600w, but it does just barely work and he has to undervolt a lot. But I agree with the others if you are going to sli it would be a good idea to get a 700-750
The Asus V Pro HAS 2x 3.0 @ 16. It's one of the best boards around, for performance, quality, and ease of use. Slightly overpriced, yes, but very good.