It's all a bit complicated for a non-techie! [NUC + ROCK working]

Steve. Agreed. It’s a Tivoli in a kitchen after all, not a cinema theatre. Which brings to mind the issue for some of us who are not computer hobbyists. I think there is a spectrum of users: from those happy with ubiquitous windows 10 updates, NAS, LAN switches/hubs, RAID, wires boxes and PSUs et al, et al; to those who favour an integrated one box solution. For me I favour the solution put forward by AndersVinberg.
It’s a broad church!