I'm hoping to get an i7 3930K 6-core on a Gigabyte X79-UP4 motherboard. I think I've narrowed my CPU cooler down to the Thermaltake Frio OCK, but I'm still open to suggestions. As for the thermal compound, I've been reading a lot of conflicting user reviews as well as more "official" side-by-side comparisons. I think I've narrowed it down to the Cooler Master ThermalFusion 400, Tuniq TX-2, regular old AS-5 or Prolimatech Pro-PK3. In terms of thermal conductivity, I believe the ranking is ThermalFusion (2.9W/m) < AS-5 (3.5W/m) < TX-2 (4.5W/m) < PK3 (11.2W/m), but I also like to consider electrical conductivity and viscosity. I usually the computer under some kind of load 24/7, so burn-in time isn't a big issue. Any thoughts?