You must have gotten lucky, I had 2 x 120mm Ambers (which have now been replaced by Sharkoons) and still have one 80mm Amber on my Evo 33, God awful they are. The 80mm is now the loudest thing in my case.
I think a lot of the fans noise is creted by vibration/harmonics transfered to the case than magnified. The AC fans have their own suspension systems, draw air from the sides and did I mention $5
I'm gonna vote for my Sharkoon 2000 80mms with Blue LEDs.. they look great, have blue LEDs (and versions without them).. so where's the catch? well there is none since they are pretty much inaudible and push a lot more air then an average 80mm.. unless you don't mind noise i would say they are the ones to get for sure