Arctic Cooling. Decent for the price, they are sometimes prone to clicking.
SUNON. lol (cheep but not that quiet.)
Evercool. They make a couple decent fans.
Panaflow/NMB. These can be hit or miss but Panaflows made in japan are considered to be some of the best fans ever made, but they have not been manufactured in japan for some time.
Delta?8O ROFL :lol:
Thermaltake. One of there 120mm fans is good and is made by one of the manufactures Nexus buys fans from, but its much easer to just buy a Yate-Loon. But for the most part TT Falls into the LOL category.
Scythe. There Fludid dynamic bearing fans are as good as the best Panaflow's, and there sleeve bearing fans are also good.
CoolerMaster. ROFL there 80mm fan=crap, 92mm fan=crap, the 120mm fans they sell are not bad but there are better options for the price.
Vantec. Decent but are pricey and are not nearly as good as fans that are much less expensive.
Papst. Not the most silent fan but it is far better than all the other brands mentioned except scythe and some Panaflows, but is by far the best built computer fan on the market. They are great for mission critical applications and for long term longevity.
SilentX there fans are sooo good they have the ability to violate the laws of physics to run at a jaw droping -10dba.
(IMO expensive and overrated repackaged Adda fans, just had to add that for fun.)
The best quiet case fans at the moment are.
Nexus, good all around fans. (Save some money and just buy the Yate-Loon's if you need 120mm fans)
Noctua. They have the absolute best noise vs airflow ratio at the moment. Just they do not do all that well when back pressure is high, basically plan on removing your exhaust fan grills. And the price well if that is a issue then don't bother considering these.
Scythe, The 800rpm is the quietest fan available if your going to run it at 12v.
Yate-Loon, These are cheep and basically just under volt them till you are happy with both airflow and noise. (Jab-Tech is where I buy mine from.)
All the fans I have mentioned have a low pitched smooth bearing noise and are not prone to clicking.
Note the Yate-Loons do not respond well to PWM control but just use the 7v trick, Zalman fan mate, or a Sunbeam Rheobus you will be fine.