One thing I always recomend with heavier heatsinks is rubber o-rings between the motherboard and the screws/pins, because much of that vibration is transferred into the mounting system of the unit. I also strongly suggest you buy the optional crossbow bracket for the xiggy 1283. Also using push/pull with two identical flow through rate fans isn't ideal. Use the weaker fan to push, the stronger to pull, thereby creating induction. If your prepared to lap in your cpu, you could drop the second fan, as the second unit will not give you anything below -5c compared to a single unit at best. A great idea for system stability is a large 200mm + dia side case fan, aimed somewhere between the GPU and RAM.