hahaha, the board for ddr3 is more expensive usually; so end up to be about the same; when you overclock it you know you will void the 3 yr warranty on the cpu right?
i dunno if u wanna oc the ati card... they're all ready running uber hot as it is from what i know... my 4850's a blazing running stock settings...
OC'n all all hardward will violate your warranty also, when you OC stuff, you are shortening the life of it too