No dual CPU, can't answer that part of your question. Temps in my dual core Opteron however are about 39*C at idle.
I find the case excellent. Well worth the money IMO. I bought it at Amazon, since shipping was free. The only issue I had was the first generation door. It warped. However Antec customer support was awesome and I had a new, second generation door in about 10 days.
Power supply is not included. You will need one with fairly long leads, as it is a fairly huge case.
\Dan