Go with the EP45, the most expensive one. It should OC just as well as the P35 mobo, but its got PCIe 2.0. That extra bandwidth should be great for any future card you decide to add on.
Thanks. It seems like a good quality board and not too much more than the EP35. I hope it works.
I'm sort of scared about changing my motherboard, but I need a new one if I want to use Core 2s.