I'm wondering which headphones are best for production. I have Beyerdynamic's DT 990 pro. The problem I'm having is, their just not bass heavy. I know their made for crisp highs and mids and they sound great, but every time I finish a track and double check it in the studio or anywhere else, the highs and mids are weak and the bass muddy as hell! So then I have to re master the whole thing. I'm looking for headphones that I can work on a track from start to finish, and have confidence that its at least close to ready for mp3.