Gianni,

Sorry, I misread you reference to AC200 to mean MC200. I hadn't contemplated having the AC200 in the mix. Of your options the last one makes most sense to me.

Streaming: Roon, NUC, QNAP869 NAS
2ch system: dCS Vivaldi, Audionet Stern, Audionet Heisenberg, Magico Q1
Retro system: 101/104/105, Red Rose Spirit