Thx for the replies guys!   How about the optical in/out, what use can you make of it? And how to you think headphones like Beyerdynamic DT880 and T5P, or Fostex T500rp will respond to Concero HPs sound?

I have to chance to buy the Concero HP (new) for about 400$ and Im wondering if its a good deal nowadays? Considering all that competitors that has come out since its release.   I also wonder if anyone here have tried it with active speakers? If so, how was your experience?   Thx!