The temps seem normal. I thought a Q9000 series had a TJMax of 95C. Might be wrong. But seeing the overclock its not too bad except for Core 0.
Might want to check your heatsink and make sure it is sitting properly as well as the thermal grease is applied properly. Also try some other apps such as SpeedFan and others to make sure its reading right.
Most Q6600's will run at 3.0 GHz with little or no increase in vcore. That means the stock cooler is adequate if the system is in a decent case. And the 65 nm coolers are about twice the size of the 45 nm coolers (2.5" high as opposed to 1.25" high).