Noctua fans will always get a recommendation, the NF-A12 and NF-A14 are both excellent. It looks like we only carry the brown/tan versions, but Noctua does sell versions of these fans in black that you can find on their website and online. If you're looking for a combination of good performance AND being quiet, Noctua is pretty much the way to go. The Corsair ML120 and ML140 fans are good as well, but they can get pretty loud at higher RPMs. If you keep them at lower RPM they're still fairly quiet, though not as quiet as the Noctuas from what I've read.
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