Finally after a long day at work, talking my son and nephew to The Hockey Hall of Fame, and then a Christmas party with friends, I'm now sitting down with my HD800S headphones. Construction wise, basically the HD800s with black...and man does the black look a whole lot better. Sound quality wise they are still very much the HD800's, but the treble is quite a bit less "prominent" in the 6kHz range...zero listening fatigue after an hour or so, so far. The bass has been tuned up a bit too (also a very good thing IMO). So far, I really like what I'm hearing...more to come.
Paddy: That was a big concern of mine, figuring the more "natural" treble response would take away from the sound staging / air, but absolutely this is NOT the case. They are still the sound staging monsters that the originals were!