newbie1992 :
Check out the Scythe Gentle Typhoons AP15s real nice fans.
The AP-15s actually have a pretty low CFM rating, though they have a very high static pressure (good). Xigmatek makes some fairly quiet fans that you can find on Newegg that are <20 dBA but push just over 60 CFM, and come in a variety of LED colors.
That said, my Scythe Slipstreams (highest RPM model) aren't overly loud, but you certainly can hear them.