the 620 and the two 920 fans at anything over 1600 RPM are VERY LOUD! the Chill Control on my 920 on my CPU is 40 dB at 1600 RPM, and peak is 56dB. If you have a sound system that shows sound lvls in dB, (Kenwoods and Pioneers are known for that) turn your favorate song up that loud, you'll see what I mean. not to steer you away from the Antec product, but if you plan on getting those and you want them quiet, get fans!
I see, what fans do you recommend i buy if im going with the 620 for quiet operation? Turns out that the Accelero XTREME Plus II will not fit in my case so thats outta the question.