Hi, I've been looking at custom IEMs recently and and planning to buy some soon.  I'm looking at the sub $500 sets and listen mainly to progressive metal (Dream Theater and the like).  If I had to rank importance of bass/mids/highs I would say mids > bass > treble.  I've mainly been looking at the JH5.  It seems people are saying this is right down the JH5's alley.  I haven't seen many comments on the UM Marvel though, so I am curious what people think about that one...