I'm looking for a green LED fan, but I'd like it to be quiet. I've noticed that most of the fans that come with cases aren't all that great. Many of them are noisy and could use an upgrade. I was hoping that someone here could recommend an LED fan that is known for being at least somewhat more quiet than average. Noctua is of course the standard in quiet, but iirc they don't make LED fans. Cougar was recommended to me, but does anyone here have any experience with that brand? Are they really any more quiet than the factory fans? Thanks!