i dont think lapping will help that much a good thermal compound like AS5 which is what i use and a really good cpu heatsink. I use a tuniq tower 120 for oc'ing and i have a custom northbridge cooler HR-05 with as5 added. i have an E6600 in and i get 3.4ghz on this cooler and its prime stable for 18 hours. if i lapped my cpu it would void my warranty so im going to lap my cooler make it look like a mirror.
__________________
|