I had to leave the studio to see my wife, but I think Hyper threading caused some issues.
My gut tells me that you will see a performance hit after disabling Hyper Threading. I can't check until tomorrow but so far HOLY SH**T!!!!
Installing windows up till service pack 3 took me 19 mins.
Also, this computer is dead quiet. You almost have to strain to hear it. AMAZING! Now to get it stable. I have no doubt that it will be though.