Might have a look at some of the responses on this thread ...
My first 120mm fans on a rad were Corsair SP120 high performance edition fans, and even when slowed way down with a fan controller they sounded like buzzsaws. They weren't 'loud' as much as the noise they did give off was distracting/annoying-sounding.The SP-120s were quiet as anything by themselves as a case fan, but when I put them on the rad and the sound was terrible. I tried using gaskets thinking that might quiet them, but they made no difference.
I replaced the SP120s with coolermaster sickleflows, which were basically junk fans I already had, but they were definitely an improvement over the SP120s in how quiet they were, and they cooled alright in push-pull at higher rpms, and they served the purpose until I got AP-14s to replace them with. The GTs were a dream. The hum they make even at 100% trying to push/pull through a rad is pleasing-sounding, unlike any other fan. To compare a Corsair SP120 to a Gentle Typhoon ought to be a crime.
As soon as I heard the news about Nidec & Scythe I ordered 8 AP-15s. If there's any still to be had at any decent prices after the holidays I'll probably try to grab at least 6 more. Unless somehow Nidec or Scythe work out some way to continue making them, I'm doubtful there ever will be any other fans that perform like GTs in the perfect balance between noise & static pressure.Edited by Unicr0nhunter - 12/16/13 at 12:16am