Now that we’ve opened the door, and started to look at a possible future solution, here is a quick sketch - to illustrate how this looks - systems diagram
New boxes required (to make this work) are indicated.
Horses for courses.
No doubt, every solution is different dependant on user requirements, existing legacy system components, budgets, etc, etc.
In this case, working with existing items, to get to multi room access of CD archive, also streaming (e.g. Qobuz), using Roon as UI throughout. As always, constraints on budget.
The solution is incremental. There is an interim step, adding Naim streamer (tbc) first, enabling streaming of CD archive over network for the second room, from Zen Mini, as well as access to music streaming services, in that room too.
Then, later, adding Roon Nucleus to introduce multi-room access to a Roon Core, with Roon as UI throughout.