nicely done man. I FINALLY found a post here that I know a bit about. (unlike hi end speakers)
I know it was not part of your observation list. But I have the Sennheiser HD-650's and I can say without any reservation that if you are looking for the best open can there is, bar none(under 500USD that is
). shop a good price (when I got mine I found a sale price I paid 365.00 USD shipped.) break out your plastic and NEVER look back. There is a wealth of info to be found about them and I dare say ANY review you read will be quite favorable.
here is a AWESOME place to start for ALL things headphone, a wealth of knowledge to be gobbled up, and they themselves make some VERY good amps for your cans. http://www.headphone.com/guide/by-manufacturer/sennheiser/sennheiser-hd-650.php
Thanks for sharing all this info, and best of luck to all in your 'quest for cans'.
