Okay, back in my room and my first impression is WOW!!
I said before in the TH600 thread that I preferred the look of Fostex's new phones with the black magnesium cups, but having seen the TH900 in real life I think I'm gonna have to take that back; the lacquer on the TH900 is just totally stunning. More subtle and darker than I expected:
As for the sound, the bass is fantastic as expected, but the whole range is superb and the imaging is the most impressive to me considering the closed design. Can't say much more about it at the moment but I'm delighted. Gonna be spending a lot more time with these beauties!