You could save a few bucks and order some of the parts used from the marketplace. My Biostar board is up for sale right now (yes, I know, insert marketing here.... ). The LE board is a low end board, with a 4 phase power. It probably won't break 4.4-4.5GHz. My Biostar is a 5 Phase, and will take it to at least 4.8GHz. I can get 5 with my current chip, but temps get out of control.
Also, I'd look into a 6870 or a 6950 instead of the 5870. Better cards. And the PSU, go for the Antec Neo ECO 520, or the Neo ECO 400 even. You really have no reason to buy such an expensive PSU for such a low power build, and the OCZ units are mediocre anyway.