...actually the non-grain is something I know from other McIntosh components and I always appreciated very much.
But I never had the chance to check that with ultra-transparent / highest-resolution loudspeakers or headphones.
So I wasn't sure whether this virtual non-graininess was due to certain softening / rounding of signals (sorry, I have no better way to express it) or whether this is really a substantial quality of McIntosh components that would also stand against a highest-resolution reproduction background.
So the Audio360 review definitely helped me to clear that out, at least for the D100... thanks!
Now, who knows, if I didn't just recently buy the HDVD-800 ...(what I definitely do not regret)...
Still, I actually would look into the D100 as a excellent DAC with an equal-quality headphone-amp integrated, whereas the HDVD-800 is a mainly excellent headphone-amp with a 300$ level DAC integrated... so lets see whether I decide to upgrade the DAC part of the HDVD-800 with the D100...