I undervolted to 1.1 volts and my idle temps are around 58. 63 at full load.
HD gets to like 52 if its hot in the room and playing games. Otherwise hovers in upper 40's.
I couldnt get the 5.8s to work, so I was using omegas. However I couldnt get ATI control panel to work with that, even when upgrading to .net 1.1. So now I'm back to the ones that came with it. But they are fine for me, CS is the only game I play and it runs great at native resolution