I can offer my impressions on the Edition 9. They had a ton of bass even at low volumes, holy moly it was a lot. The U shaped FR wasn't so bad, but it was evident. Surprisingly nice depth to the soundstage. However the main thing that turned me off them is they have a midrange coloration I haven't heard in any other headphone that makes vocals and guitar sound off. And the soundstage was tiny, much smaller than Ian's modded HF-1, HD580 balanced or HE60.