kckrs, good move. I have been playing with my Rivo+ with linear power supply for a couple of months, and I think your proposed connection method will work great. This is exactly how I setup mine. I started with just the AT&T modem/router without the eero6+ mesh and the wifi connection was weak at 2.5 ghz. Now, with the Mesh system, I get 5 ghz at the Rivo+, but, I also went to the direct ethernet cable to the eero6+ node. I also run a linear power supply to the eero+ node and a Stack audio smoothlan to the Rivo+, but, of course, all that is overkill. I believe you will love the sound of the Rivo+, please let us know... BTW, I think the Volumio software with Qobuz connected on the back end sounds better than the new direct "Qobuz connect". Also, putting your files on microsd card (1TB in my case) is better than a USB stick. I asked Volumio support which storage media would have the best sound on the Rivo+ and they ranked it 1 to 3 in this order - Microsd, SSD, USB stick. Also, I tried multiple monitors with the Rivo+. The only ones that work are 4K monitors. I am running a linear power supply to a 13.5 inch 4K OLED monitor with a remote mouse which has the usb dongle plugged into the USB 2.0 slot on the Rivo+. I could not get "touch" to work. In addition, to your remote devices, ie. iphone, ipad, etc..., this works perfectly to control your Rivo+.
Note: Since my DSL is all copper, I bought a pair 10GTEC 1.25G Media Converter and a short fiber optic cable and put it right before the anchor eero6+ anchor mesh node. Probably just more overkill...
I am using the same DAC for the Rivo+ and my CD/SACD player and I can tell you that the sound quality is extremely close. I will have to do some serious A/B testing to grade the differences, ie. ripped dsf file from SACD on Rivo+ microsd vs SACD player, and Qobuz hi-res streaming vs hi-res microsd file on Rivo+.
Here are a couple of pics: