Just a heads up, the 13cm fans from thermaltake that are set up to fit in 12cm fan holes, yeah.. they don't fit inside the p180.. I found tha tout the hard way.. Case modding , here I come!
14dBa from 10 feet away maybe. TT's rating's are a joke, and IMHO there needs to be a set standard as to how manufacturers rate such things. For example low speed Yate's are rated 47cfm, at 28dBa.. So if that fan really does put out 54.4cfm, I'd have to figure it's dBa rating is just north of 30dBa really.
Oh, and the small fans on the Armor are 90/92mm's not 80mm. And the top spot is pretty useless IMHO w/ how restrictive it is (took mine out along w/ the wings the moment I got it), but I digress - seems the OP has an Antec case anyway.