I use the Melco N 100 server and I purchased the their Optical Ripper, along with another Melco storage device. The optical ripper can be used to spin CDs as well if combined with the N100.
The Melco doesn’t contain a DAC and I didn’t quite get what the OP was saying about the relationship he seeks between his DAC and his server. If I was him I would get combine the Melco with an SACD player that has inputs to allow it to be used as a DAC.
As usual the OP is asking about a storage solution and is being bombarded with responses that he should be exclusively using a streaming service in its place. I think a more helpful response would be along the lines of “I prefer to use a streaming service, but to respond to your question, this suggestion might be tried…”