It all sounds good to me! i think you may want to get a video card instead of a motherboard for a video card, however. Your link and caption are to the 680i.
It is a little lite on the +12V rail, although just sufficient for the system with a single 8800GTX. It's out of stock as well. Grab yourself a Corsair HX520W at the same price - a much better PSU.
Are you planning on one 8800GTX or two? If it's two, both that Hiper and the Corsair I mentioned are insufficient to power the system, and you'd be better off with a Seasonic M12 700W.