UPDATE: So im basically stuck between these two right now:   ATH-M50 for $99   Ultrasone DJ1 for around $130   http://www.amazon.com/Ultrasone-DJ1-Surround-Professional-Headphones/dp/B000GU77SC/ref=sr_1_11?s=electronics&ie=UTF8&qid=1287151278&sr=1-11   does anyone have any...

sorry knew i forgot to mention something. I will be using them for portable use with my ipod touch as well as amateur dj software on my computer. they should be comfortable for over an hour or more

So im currently looking at replacing my sennheiser hd 201 due to their lack of portability and a few flaws in the sound department.   The things im looking for are: -collapsible design (very important) -excellent sound quality (very important) -either nc or closed back (maybe semi-open...