If you're determined to use Roon in spite of it's inferior sound quality then stick with one of the end points that don't have their own software and are meant to be used with Roon like SOTM or Sonore. The other companies like Lumin, Auralic and Aurender are optimized for use with their own software first.
What are you finding that sounds better than Roon?
My experience is with Auralic, SoTM streamers (on two occasions), Raspberry Pi Roon endpoints, and a battery-powered and modified Mac Mini running Audirvana Plus. Nothing has sounded better than running Roon from a Roon Rock NUC via USB directly to my Holo May KTE DAC. It may just be that that combination is particularly effective.
I owned an Auralic Aries G2.1, and it was not good. I set it up with their Lightning DS software since they do not implement Roon well despite claiming to be Roon Ready. Lightning DS is clumsy and buggy, and the sound via Lightning DS was not as good as running Roon via Ropieee on a Raspberry Pi with an Allo DigiOne HAT powered by an Uptone Ultracap and output via a very expensive coax cable to the DAC. With the Auralic the well-done marketing did not correlate to better sound. Investing in the coax cable and an extremely pared-down digital streaming device with clean power gave me better results than the Auralic for $1600 compared to $6000.
SoTM is even worse than Auralic. The devices have major issues with their network connectivity, and the software is a mess. When I tried to work with sporadically responsive customer service to get a software update that was supposed to address their network connectivity bugs, I found that there were three different versions of the "current" software. US customer service sent me an outdated version compared to the one on the very confusing SoTM website itself, and a third version was posted by SoTM on a customer support forum. I've connected more than 100 devices to my home network flawlessly, and the SoTM streamer is the only device that failed to acquire an IP address from the network. It never did work, and there was nobody at SoTM who would support the product (beyond the "did you plug it in" kind of level zero "technical support"). I actually tried SoTM several years after the first bad experience, at a different home on a different home network that was also working perfectly with everything else, and I had the same end result with SoTM: buggy software that wouldn't acquire an IP address from the network and helpless "technical support".
I haven't yet fully experienced the sound quality with Roon on my M3 Sapphires. My recently added Pass Labs XA25 shows that there is more there still. I'm am certainly open to there being something better than Roon, but I have not run across it yet despite years of trying a variety of options.