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Question: Which headphones have similar sound quality?

I'm looking for a more comfortable (over-ear) headphone with the same sound quality (especially bass) as the HPX 4000. I already have one of these but they get very uncomfortable after wearing for a few hours. I have tried the Sennheiser HD 280 Pro and the Sony MDR-XB500. The former is very comfortable with very good definition and clearity but no bass and the latter has too much bass and very little definition. The HPX 4000 has just the right sound quality I'm looking for. I would be greatful if anyone could help me out here. My budget is up to $130.