These two above items are on combo sale right now.. you get $30 off plus the gpu has $30 rebate. Sound like a decent deal for combo?
Any other type of Mobo I should consider? (I would rather not spend $200+ for mobo if I don't need to)
Anything above DDR2800 is worth only for overclocking. Any major brand (Corsair, OCZ etc.) is OK.
As for the mobo, get a x38/48 instead of the p45.
You should also consider spending some $ on a good PSU. What do you currently have inside your P180?
People already answered the question on x38/48.
The thing is, with such a nice cpu/gpu, it would be a shame to prevent some future CF because of some extra dolars.
Unless, of course, you're sure you won't need it.