Noctua NF-A14 PWM Fan Video Review
 

"The Noctua NF-A14 PWM Fan is a premium quiet 140mm fan that's perfect for a case, cooler or radiator. Since it sports a SSO2 bearing, flow channels, stepped inlet design and inner surface microstructures it's quiet, performs well and has a long lifespan. You can't go wrong with this fan!" ~3dGameMan.com

http://3dgameman.com/reviews/1518/noctua-nf-a14-pwm-fan