Guidocorona: I use the X-01 as a transport with the dCS units (with a Kharma Enigma cable) and, of course, by itself in SACD (and the DV-50 for DVD-A). Yes, the combination beats the X-01 by itself by a small margin--a bit more life and sparkle in the highs, a tad more transparency in the mids, perhaps a bit more detail in the lows. I'm not suggesting it makes sense financially if you're going to do it from scratch, just that I've had the dCS units for a while and am just as happy retaining them. Same thought process with the DV-50: as long as I've got it, it made more sense to keep it for DVD-A rather than go for the UX-1, which doesn't quite match the X-01. Obviously the order you buy things in governs a lot of your choices.