I'll try and keep this short and sweet.
I'm looking into getting my first pair of respectable headphones, and am deciding between the Bose Q C 15s or the Sennheiser HD-598. I've been thinking on it for a little while now, and I noticed Amazon Sennheisers to about $180 new. I could also pick up a pair of the Bose for around that used. I know I can't really go wrong with either one; however I'd love some input!