Scythe USA

Pros: This fan is amazing... Its takes up a bit of space in your case, but when its running, make sure you have your PC secured, because this thing is crazy! (Don't really need to secure your PC) I have it in a closet w/ all my cables running out to my desk, so, the noise does not affect me... It does however affect the temp of my computer, which I am not sure the # off the top of my head, but its on the very low side of the spectrum.

Cons: Is noisy, but, you can adjust the speed or if you have it enclosed somewhere, not an issue...