I recommend a used Aurrender N100. But any Aurender you can afford. I own two.
If you do not have the upgraded power supply for your DAC, I would also recommend that.
I have heard the N100 against streamers of a lot greater value and besting them. Very natural sounding and detailed. It is very well built and the Conductor app is very well liked and funtional.
i would avoid the Roon. Unnecessary cost and I don’t think it will be around for the long term.
Also, do not get one with an internal WiFi. They tend to perform very poorly and be unreliable. Just buy a cheap wall wart WiFi extender and plug in next to your system, plug a short Ethernet cable into that.