If you are going to get 5-6 fans I would expect a bit of noise since they would be on full bore all the time. I would say a fan controller would be good if you can't hook some of the fans up to fan headers that are controlled by the MB.
I have a few that I can recommend I just wish they were in the $8-$9 range but they all have good reviews behind them.This Gelid
is dustproff, waterproof, comes with is own controller and you can remove the fan blade for cleaning. It also has rubber/silicone mounts to eliminate fan vibration sounds. Its also 19.99 so its a bit pricey, on a side note it does have a 3yr warranty.This one from Scythe
gets good reviews and is a bit cheaper @ $16.99.
Another Scythe that is good but out of stock at Newegg is Scythe GentleTyphoon D1225C12B4AP-14 120mm Case Fan @$16.99
The last one is from NoiseBlocker but again is a bit pricey and I have seen two different models here @$19.95
and one here @ $22.79
I guess it depends on how far you want to go to keep it silent.
i'm realli loving the Scythe PWM fan
granted it's not absolutely silent, and does spin up a little at load, but it's doing an awesome job.. and probably once i straighten out the remaining fans, it will all come to a golden silence (or silver)
never thought Fans alone would/could be this costly...its like buying another whole entire ATX case to stick into my existing case.. e__e
this is actually my first time being this concerned with fan noise...i've tolerated it for 3 or 4 years now, its time i do something about it... each night i go to sleep, i put my rig to Sleep too, and boy you should hear the sigh of relief when the rig shuts down...its like i can actually hear people making babies 3 blocks away.
so yeah, just took a quick look at Fan controllers... i'm leaning towards this one Scythe KM02-BK
..any comments? :]
this is my case P182
, i have running 4 case fans, and then the proc fan which is the PWM fan thats hooked into the cpu header.. so i'm guessing a fan controller like that one i picked out that handles 4 fans would work well. and a readout panel is always handy :]]