Hi Group, I'm in the process of building some new CAD machines. These will be Athlon 64FX's for the singles, and Opteron 248's for the duals. Does anyone have any MB recommendations ? Most of the stuff out there is still pretty new (makes me kinda nervous). There seems to be two chipsets available, N-force, and AMD. Does anyone know the advantages/disadvantages of either of these ? TIA Mark