is it worth getting? i havent seen any reviews or any comments about this product, im wondering for 25 pounds (including postage) is it worth getting? i have a i7 rig and double 4890's, will i see any change in temp if i purchase this? and if i do what kind of a temp drop are we talking about? 3-5 or maybe 10? also whats the best thermal paste that i can get?