Re: what do u guys think?
Firstly look at the Gigiabyte P35-DS3R motherboard. Its not crossfire, however, it is pretty much the best single PCIe motherboard out there at the moment for price, performance, overclocking.
As for the cpu go the Q6600 out of those two, its cheaper and its a quad core so there is no comparison really.
For the ram, get nothing less than PC6400, you will want it for that cpu. I would recommend G.Skill, Crucial or OCZ at the moment.
What PSU do you have? 550W is enough, but only if its a good PsU.
A cheaper option than the Raptor would be to get two Seagate 7200.10 drives and raid them, plus you would get more space.