I heard idle temps are not reliable measurements. Instead we should work with the load temps. I ran my stock 2500K (w/ CM hyper 212+ in stock config) through Prime 95 for about an hour and the max I could get it was 52C. The ambient temp was 27C. When I have more time I'll reseat my cooler and try more programs.
Also, have you guys been following Bulldozer news? This is pretty interesting:
Bulldozer performance figures are in