I'm listening to the HE5's right now with a Compass and the sound is excellent, certainly not up to par with my Melos or Ear or the EF1, but it is very nice and foot tapping. These are nimble phones with quite the rich sound, better than Omega II's in my opinion, in fact better than any electrostat I've heard. I'm going to compare these to HD800s on Sunday and I can't wait. They look gorgeous in real life and they feel so very well built. In the $600 category, I would say they are impossible to beat given the current offerings.