I've got the CPU at 3.66Ghz 20X183 1.28v. The ambient temp in Atlanta here in the Summer in my house is usually 25-26C. Mind you, that's with a push-pull combo on fans and Gelid GC-2 paste. I was surprised by the temps myself and have used Speedfan, the bios, and an EVGA tool, E-leet to confirm the temps and they all say the same thing. This same cpu used to run at 41-42C idle and 63C under load at 3.4Ghz. with the Scythe Mungen2 cooler. The Megahalems was well worth the purchase price for me, that's for sure.
Oh, almost forgot, the case is the Coolermaster HAF-932-great airflow.