The NAIM streamer / DAC is quite good. I am running ROON on a different system than my NAIM , so can’t directly comment on a a/b comparison… You might try the NAIM forum for more insights on a more direct comparison. Also…in my opinion, you are getting good advice on both roon core hosting and fiber implementation, small green computer can help w affordable kit.
roon sound wasn't as good
I'm among a smaller group of audiophiles who have tried roon really hoping to keep it for tis wonderful functionality, but chose not to continue to not use it based on sound quality. Basically, sound quality via room was different than direct from my Naim streamer using its native (not great functionality) software. I lose some of the warmth and ambiance and get a harder edged sound You don't hear this often (though I have read a few others who were also not happy with a perceived sound difference) but I tested several tracks and music types (using tidal in all cases) and the results were consistent My server for roon was my pc, the Naim is an ND5 XS2 and is a roon end point. I am using the Naim built in DAC.