I would definitely keep the MD600 rather than go MC600.

I do have a Source:Five so can check a 192kHz file on it.

At least with the MS200 you can buy them one at a time to spread the cost. I did manage to negotiate a reasonable discount when I bulk bought mine (this was still pretty close to launch date).

As you say, they do have an analogue out, so it would be easy to site them by your existing systems subject to network cabling.

Sooloos, Roon, G series (with LPS upgrade), 800 series (with LPS upgrade), HD621, AC200, Prime and PS, DSPs old and new.

Purdeys, Moke, Leica, 'Blad. Only the best.