Streamer question

Excellent Holo Audio streamer.  I have the Cyan 2 and love it.  I picked up an Innuos Zen Mk3 streamer with 1TB storage to rip CDs and the pairing sounds great.  Got it used from a helpful local dealer for $1800.  Innuos has a range of streamer options and prices and have excellent customer support.  

I use Cambridge Audio CXN 100. Mainly I listen to my own ripped CDs from my NAS. I also use the AirPlay and Chromecast functions to stream from my streaming services (Apple Music and Pristine Classical) but the CA will handle both Tidal and Qobuz directly. The CA also does Internet Radio and Podcasts quite well.

My Melco NAS is also a renderer and accepts Tidal and Qobuz. It lacks the other features of the CA and the OP already has a NAS.

  I don’t use Roon

The most recommended connection for the Holo May is the USB between The DAC and a streamer. I know you said you wanted to get rid of USB connection, but maybe there is another way to do what you want and keep the USB. I use the Lumin U1 to the Holo May via USB and it sounds fantastic.

@chrisg1000 you say 

Roon core is on an SSD plugged into the NAS

how is that possible? Roon provides requirements for the Core to run correctly. You need an OS to install Roon, you need CPU and memory to run it. What you’re saying here with your Room core being on SSD plugged into NAS makes less sense than your statement about getting rid of USB. 
 

So what are you talking about?

I've run Roon in this configuration for probably seven years with no issues. The issues have started as I've passed 10k albums. And more specifically most of my issues are with artists I have more than 1,000 albums for. If I only have a few albums from a particular artist it works fine.