So I'm a little disappointed....
I swapped out the heatsink and fan tonight with a buddy'* help, though we almost killed my processor from thermal paste overload. He has built a few systems, and said he always puts paste over the entire bottom surface of the heatsink. Bad idea. The paste must have created a short between a few of the terminals on top of the processor, so after hitting the power button and watching the system begin posting the mobo speaker started wailing like a siren and the system shut down. We cleaned some of the paste off the heatsink and proccy, then put it back together. The computer works, but unfortunately my system idle temps are only 2*C cooler than before!
What a bunch of crap!
So I'm wondering if there'* too thick a layer of paste between heatsink and processor. I just can't believe this humongous heatsink is not keeping the system cooler. The fan is turning at the advertised RPM, too. Idle temperature is now 51*C, compared to 53* or 54* on the stock heatsink and fan. I don't know why this thing won't run cooler. I'm not overclocked or anything.