Okay, now it's my time, my buddy NoXter bought one and came along yesterday. I asked him, hey, how do you like them, and he answered, don't know, I'm somewhat ambivalent.
I second that.
I must admit, the build quality, the bass and especially resolution & blackness are absolutely worldclass. That is really shocking, my MS Pro and the 880'600 are really midfi in comparison. I also liked the coherent soundscape and its treble section.
Howewer, I have two issues. One is the mids, which are way too cold and bright for my liking, consequently the mature voice of David Sylvian gets a strange teenager-ish coloration (nice for female voices though). The other issue is the sheer musicality and genre bandwidth. Sounds great (really
really great) with orchestral Classical, mainstream Pop and Electronica, but doesn't have enough heart for Singer/Songwriter, and not enough beef for "harder" stuff like D&B, Techno or Metal sort. It performs much better than the HD800 or a SR404 in that respect though.
I'll try the D7000 in a while, if that thing behaves similar, I'll have to give up "high end" globally and stick to my hifi. Musicality has always beaten ability for me (but a DT531 or KSC75 is a bit too musical...)
Finally, 2 sacrileges. IMO not too hard to drive (much easier than the 880'600)...
...and the inner cup seems to be identical with the DT880'2005, except a shocking absence of damping material