I don't know much about the Megahalem.. the TRUE is tried and trusted by thousands. buy one used lapped. You usually can find them on enthusiasts web sites for sale pretty often.. I have one lapped, but I'm keeping her for a rainy day.

Also nas, you said you used AS5. a line across the cores. how big was that line? like from one side to the other. and how fat was it.. if so that is to much.. with thermal paste, even on these Quads. you're ok with using a slightly smaller than a Pea sized DOT, right in the middle of the CPU. then when you add the cooler, twist each side a little at a time so it adds pressure evenly. that is best way. a line across it all is probably to much. and to much actually traps the heat in. Also AS5 is no longer the best TIM. it's been beat out by a good 2-3c by MX-2, ICD7, or OCZ Freeze. I personally use MX-2. that will also help with a few degree's.