I've compared Wadia 850 (which I own) to CD55 in my system. I think both sound very good, but I found the CD55 to be a bit too "analytical" for my tastes. I disagree that the CD55 has a "superior" volume control just because it is of an analogue type. When used correctly (kept at >70), the Wadia digital volume control does not degrade sonics, in theory and in practice. In short, I think the Wadia is just more musical and realistic sounding. Here's one possiblity: Buy a used 850 and have it modified by Great Northern Sound (I had this done); you'll end up with a great CDP rivaling the more expensive Wadia 27ix model.
