Re: pawer suply quick help
i would say go with
ep45-ds3
q9550
4870x2 (if have less money 4870/gtx280)
620hx (will run system fine)
crossfire 4850's would seem a waste now. Why crossfire older cards when there's one that can do much better by itself (even though might cost alot more, those are the kinda cards that keep their value (8800gtx).
if you insist in xfire, get a x48/38 but the asus rampage is pricey look for sumthin a bit cheaper like
dfi t2r - x38
note: x38 and x48 are the same. cept for native support on the 1600mhz cpu's. (who cares).
if u insist sli then go a 790i ftw! edition, cheaper and still offers most of the features you probably wont use. forget the 9800gx2, go with either a gtx280 or gtx260 for nividia.
but as of now 4870x2 is the best card by far. keep that in mind.