10-29-11: Tobias
The Moon 100D ( at about the same price! ) would be an upgrade from the DACMagic.
The Moon 300D is a lot more expensive. Upgrading to that would be really worthwhile, though, because it would keep you happy a long time.
Yeah, don't bother with the 100D. You'd be wasting your money on a sideways upgrade. I've tried both of these moon DACs as well as the DacMagic. The 300D would be a significant upgrade; it'd easily be worth your time for an audition.
For what it's worth: despite the marked differences provided by the Moon 300D, I got more out of my digital source from a LessLoss DFPC Signature (power cord @ $1149) than I did from the $1800 Moon 300D. But, since your DacMagic doesn't have a standard IEC power cord inlet, and since you're not talking about satisfying your analogue or digital cd-player 'needs', perhaps that isn't relevant.
Anyway, I had a look at your system: everything looks very nice. Such a tranquil and relaxing-looking space.
Cheers,
Aaron