Overkill to be honest but if I won the lottery I'd go for it.
I think the GTX 595 is released soon, a single one of them and a good 700w PSU and i7 950 would run any game at max settings 1080p.
No need for 2 BRD, just one would do.
I bet if you built all that yourself you would knock 25% off it. All professional wiring is, is wires in braided cable tidy's, tucked away and routed through parts of the case you can't see, meaning they're not visible or obstructing anything.