wheeljack12, you should probably read this before deciding on a motherboard:
It seems that in most cases, a P67 setup via x8/x8 PCIe is actually faster than a solution with the nf200 chip @ x16/x16. Something to consider.
EDIT: This is done by 2 single GPU cards, though. If you want 2 dual GPU cards, the x16/x16 solution may be better. If you're doing dual 3GB GTX 580's though, I would go with the intel solution without the nf200 chip.