I must say this may be the coolest headphone thing I have seen on the market right now (I know there is another manufacturer doing this too, I can't remember the name right now):
Headzone PRO
Has anyone heard the head tracking? It is available for the DT880s. I'm sure it costs a fortune (apparently around 2900 euros with the head tracking for full 5.1 effect).
I'm hoping they sell the software separately. That would be awesome.