I just ordered a silver Concerto and Stage DAC combination. Jan responded within 15 minutes of my initial email. The amp and DAC were shipped out today, and he said it should take about two weeks to arrive here (Northern Michigan).
I already have a WA6SE, which I love (although it is not totally silent, which I have heard the Concerto is) and will keep, at least for awhile. It will nice to have a tube amp and a solid state amp.
My planned hookup will be to connect both my Marantz 5003 CD player and a Mac Mini running iTunes (Apple Lossless) to the Stage DAC using coaxial for the CD player and optical for the Mini. Then on to the Concerto, and to my headphones.
I will probably also connect the RCA analog outs from the CD player directly to the WA6SE, using the CD player's internal DAC, which is quite good.
The iTunes library on the Mac Mini will be eventually be controlled with an iPad.
I do like the tube sound of the Woo, but the faint noise it produces bothers me a little; it's only audible when no music is playing, but I'm hoping that what I've read about the dead silence of the Concerto is true.
Jan made a deal with the devil and as such it is impossible to hear noise on the concerto... well in my experience at any rate ;). Even my most sensitive IEMs could never hiss or hum or anything at any volume.
No question it is an excellent design.