Real Temp is the most accurate programme out there at present imo. It's not that Real Temp "is not ready for these 45nm cpu's" it is a sensor problem.
There is a known issue with 45nm sensors sticking
Have you read unclewebbs thread over at xtremesystems forum, perhaps you might understand a little better if you do. it's not the idle temp that the in die sensor is designed to read but the TjMax, when thermal induced cpu clock throttling kicks in so the temp you should be worried about is 100% load.
have you checked your stock cooler pushpin mounts to ensure they're correctly engaged??