If you want a cooling system thats really quiet and helps speed up your machine, I would recomend one of the liquid coolers from Cool IT. They are a Calgary company that makes kick ass stuff, and it works better than anything I've checked out. I have it in my multimedia computer at home. It works and it looks super cool (I have a window on the side of the case). This thing is a gamers dream.
link
http://www.coolitsystems.com/