So I've heard the Beyerdynamic T90's on a Bottlehead amp at a friend's house, and man are they gorgeous. This pair of headphones is LIGHTYEARS ahead of my current ATH-M50's. But I've also heard some very good things about the He-400's and the He-500's.
Can anyone be kind enough to provide comparisons of the Hifiman's in respect to the T90's?
Thanks so much!