Which senns did you go with? I owned the HD650 for a short time, but didn't like that the bass couldn't keep up with metal or other fast hard hitting music. But I did use it with a tube amp at the time so that could be a factor why it couldn't keep up. Now that I am using a solid state amp, maybe it would fair better.
Edited by vegasf1 - 9/10/14 at 7:34am