Xigmatek CLF-F1455 Purple Crystal LED Cooling Fan 140X140X25MM

Cons:Massive airflow = A lot of noise! use with a fan controller to slow them down when system is idle. Can't be installed with rubber gromets without modification.

Pros:They produce a massive airflow and the LED light level is just high enough so it doesn't bother you if your computer is in your bedroom.