With regards to cables, go for a good CAT7 cable, or maybe Meridian's own SpeakerLink cables (also pricey), there is no reason at all to buy these ridiculously priced cables (it's fraud in my opinion)... the only important thing is that the cable is shielded (STP) and plugs have a reasonable quality...

BTW, I use QNAP plugin on a HS-251 connected via router to MS200 that feeds DSP8000USE directly - sounds amazing - have not tried MC200...

818v3, Trinnov Altitude 32-16, 271, G68ADV, UHD722, DSP8000(U)SE, DSP5200 (SL), DSP5200HC (SL), DSP3200, 4xDSP320.2, G98, MS200, Prime HA, Ex2, 561, 598DH, 504, Roon Lifetime, Roon Rock, 218, Oppo 103, Panasonic UHD9000