I don't know, but I used to be a huge HP kinda guy but got away from it for a long time. Just recently got back into it again. Sort of expensive starting over but I still had a couple headphones left (in the closet) and my old amp. I have since got a new dac/tube amp and another phone, but still have a long way to go. I would be interested in attending the next meet for sure, I live up north in Everett but if I have enough notice I can make it down to Seattle or where ever you have these. If you want I can bring some stuff, but I don't have anything awe inspiring just yet, unless you count my HD600s :)
i would really like my spouse to hear the HD600's.
and (if at all possible) the HD650's at the same meet.