Suggestion for $10K soup to nuts digital?

What about just purchasing software for your Mac - Roon and HQ player? You can then either go straight into a network ready DAC or purchase an endpoint - like Sonore - to "convert" the ethernet into USB for a USB DAC. Roon and HQ player will cost you under $1K to purchase and are loaded with features, including some very high level filters in HQ player. Of course dealers will tell you that "a dedicated streamer is needed" but no one on this planet can demonstrate a rumor of difference across every measurable characteristic nor a plausible mechanism for why the sound could be any different. This is NOT a bits are bits argument - it is a modulated analog signal encoding digital data is a modulated analog signal encoding digital data when the signal is received by a modern receiver argument.

This leaves you $9K for the DAC! That would be a fun for shopping. 

|  I am new to digital, but the last millennium CD player always worked fine.

Oh - so you want to also be able to play your physical CDs, rather than rip them to the computer? You have a nice network setup already with a Mac in one room and the stereo in the other. I have the same. I use an optical Rendu as an endpoint to erase any OCD feelings about noise entering the system - deep breathing or therapy likely work for this as well. You can run all the software on your Mac from anywhere. As to the last millennium approach of browsing through your CDs or records, pulling one out, and popping it in the player, no modern software or streamer captures that experience (in my opinion). If you want to stream, then you no choice other than to submit a different intuitive interface with music.