Thanks guys.  I think I'm going with the HD555's. 

  Quote: I just simply do not want closed phones.  I have a pair of noise-cancelling phones for when I want to be anti-social and study, and not be able to hear my roommate/friends, or have conversations with people as they walk by my room in the hall.  I don't like to be completely...

Some of you guys are jumping way over my budget, and throwing in closed phones, all without stating any reasons.  

I am a long time reader, first time poster.  I've never owned any audiophile quality headphones.  I currently have a pair of Phillips noise-canceling that I use to block out some background sound for studying, but I really don't like them for anything else.  What I use to listen to most of my...