I pretty much agree with Fenril, I know WTF???
the i7 920/930 are one of the best CPUs out, and since they use the 1366 socket, there is a better future for the MBs. 6 Gb will run you fine. Either Asus or Gigabtye have very good MBs. You are getting a top Graphics card, another good for a long while choice. Throw an SSD in the mix and you are good to go.