The P180/2's are good for silence, Antec got the guys from silentpcreview to help design it. That being said, Antec's are fine, but if you're going for an excessively powered/classy computer, you cannot possibly go past a LianLi!
Going for silence though, the P182 is probably what to go for. Checkout SilentPCReview's list of recommended cases if silence is, for you at least, golden.
http://www.silentpcreview.com/article75-page4.html