Erm, thermal paste is not an option but a necessity unless your heat/sink/fan unit comes with a factory pad and lands on a clean chip, personally I get rid of the pad using %70 isopropyl alcohol and then applying a rice sized bead of Artic Silver 5. Others have their own faves.
Everything that irritates us about others can lead us to an understanding of ourselves. -- Carl Jung
eVGA X58 tri-SLI, i7 930 @ 3.8GHz., Corsair 6GB Dominator, Inno3D GTX470, eVGA260
ASUS P8P67 Pro, i7 2600K @4.60 GHz, 8GB RAM, eVGA GTX 460