"I know you can find plenty of $5 or $10 fans on the market and yes they may even be a better fit for the theme of your case, but you are going to be hard pressed to get a fan that delivers what Noctua is offering in that price range, or in most others for that matter. I know it is a tough pill to swallow for some with the choice of colors Noctua uses and the fact that the NF-F12 PWM fans do require near $20 to obtain one of them. Even with that in mind, I say that everyone should own at least one Noctua fan in their lifetime and get a personal sense of what they offer you.
With the release of the NF-F12 PWM fans from Noctua, I will be recommending these to everyone who asks me about a new fan and has silence in mind with the desire for top tier performance. They are that good."
Chad Sebring - TweakTown
Noctua NF-F12 PWM 120mm fan review by TweakTown - Introduction & Conclusion.