I currently have the HE-400 and HD600. I have a DragonFly as a preamp and use the Emotiva mini-X a-100 as my amp. I'm looking for a cross between both these headphones. The solid bass reproduction from HE-400 with the smooth mid range of theHD600. I'm looking for a EUPHONIC mid range. I want to hear the seductive female singers emotion. I want to feel the music more than appreciate its technicalities.