I want something closed back or low leakage, durable, detachable cable, efficient for use on phone / laptop, no overblown bass, did I say durable? A going away gift for music school (jazz studies -drumset) bound son. He will probably be listening to a lot of jazz. Something that can stand up to a bit of being tossed around and going in and out of a backpack. Under 200 would be nice. Reference eq is ok, maybe preferred. I've done quite a bit of research but any help would be nice . . .