those yate loons are loud, its rated at 28dba with only 40cfm
stay away from those gelids, those light fan blades make them terrible for static pressure
for cheap and quiet and some what decent you can get a pack of these
NCIX.com - Buy Coolermaster R4-S2S-124K-GP 120MM Case Fan 4 Pack - R4-S2S-124K-GP In Canada.
those are rated at 20dba @ 42cfm. i use 2 of these on a CM 334.
for high CFM and noise ratio/price, definitely go for the ones stated by 1Tanker.