You can't beat Scythe Ultra Kaze 3000. 133cfm and a whopping 6.05mmH2O! I have 3 in my case and, for me at least, the noise is tolerable.
Nevermind i just found these http://www.newegg.com/Product/Produc...-055-_-Product and they whoop the Gentle typhoon AP-15. With only .5 more dba there like 20cfm greater and they make a 140 mm addition if you need it!
Edited by Mikehunt47 - 6/6/11 at 9:09pm