I swapped my 1 week old 2006 DT880's with Dave's HD600's. Not only did we have solid PM/e-mail communication, but he was really awesome to chat with over the phone. From our very enjoyable phone chat, it was apparent that he's both really knowledgeable and passionate about enjoying music through a fine setup and rig. He is definitely trustworthy and a pleasure to deal with. Thanks, Dave!! I'm very much enjoying the HD600's as I type this!