I've had my Sennheiser HD 580's for years and years now. They're great, but I'm a bass head and I want some more bass. I wear these things all the time, so I need whatever I get to be just as comfortable.
Right now I run them off a Creek OBH-11 amp.
I use them for: 70% gaming, 20% music, 10% movies.
What would be a good upgrade under $250?