well if u want rly good overclocking ram then that ocz is good, plus it will run in t1 and not in t2 like that 4x512 geil would. for that heatsink, im pretty sure that it is a little better than the xp-90/120 but its also 3x the size/weight. many mobos have been broken because of its weight. so i would highly recommend the xp-90/120 or the new zalman 9500, unless you have ur mobo laying horizontaly.