Do you own any Japanflos, Nexuses, or any other SPCR standard? I'm not trying to be a jerk here, but it might be the best thing you've ever heard simply because you haven't heard a sufficent amount.
I was just waiting for someone to say it
I currently use Coolermaster 120mm UV fans, the same as reviewed here
. You added it to the "top 120mm fans" sticky yourself
The fan on the heatsink is only an 80mm fan, but it is better, in comparison - if Arctic cooling made 120mm case fans, I would have surely bought them.
In free air, there is audible chatter from the coolermasters that just does not exist in the arctic cooling. Maybe I got a particularly good sample, but I honestly can not hear any bearing or motor noise from it, when I can easily hear it from the coolermasters, in the same environment. The coolermasters spin super slow - they are rated at 0.05A, and in the review the bearing noise is listed as "none". I own 4 of them, and I can still hear it in the best sample of all of them.
If I turn the arctic cooling way down from its max speed of ~1500rpm, I still can't hear anything in the way of bearing/motor noise. The only difference is the reduction in the small "whoosh" sound of air going over the heatsink. I can reduce the speed down to 20% or so in speedfan and have it still spin, and while I admit I haven't done THAT in a while, I don't recall hearing any bearing noise from it then, either. Honestly, I am really, really impressed with it - I couldn't be happier with it, especially considering it + the heatsink cost about $20CAD.