Hey guys, I'm doing some research on headphones, before I buy a pair. I'm primarily looking for good tracking headphones, so isolation and comfort for extended wearing is crucial. I might also consider buying a pair for late night sessions (not mixing), just to listen and/or work on recordings at late hours. Any ideas or suggestions? I know this is a very subjective matter, but want to see if I can get some kind of general idea. So far I'm looking at: Sony MDR-7506, Sennheiser HD 280 PRO and AKG K 240. My budget for now is around $100, could go up a bit more, but I just want something to get started on, will upgrade later. :) So if you have any comments, suggestions or experiences, feel fre to share! THX, D!J!X!