Do please note that if you AS you are voiding the AMD warranty on the CPU
I have a 2500+ runnin' on "The Pad" for the last few months with nothing but stock HSF and am running a cool 39-40C running FAD and UD at the same time at all times
The pad is fine if you're not OC'ing
If you put the AS on even a BIT too thick it acts as an insulator instead of a conductor and will cause it to get HOTTER instead of cooler