if you plan to go over 3.6 then get the q6700 if not he it is a waste...get the q6600.
Make sure you get a 512mb version of the 8800gts (and like said don't get 2 unless you are running at 1920.
get crucial ballistix tracers (4gb....or 2gb)
If you are going to get vista get vista home premium 64bit.