I’ll try to be helpful… but i find hard to follow your post.
First, I have a high end system. I am using a wall wart extenders to bring a connection to my streamers… which I plug my Ethernet cable… see my systems under my user ID. No noise whatsoever. $69 extenders. I did add a EtherRegenerator to my main system… there was a small improvement in sound quality. My dealer uses the same method to feed his streamers for his $200K systems.
A word about Naim. I don’t normally voice much opinion about brands as different people are looking for different sounds… and I haven’t heard Naim in a while. But to my ear there is no more unmusical sound that I have ever heard. I mean you can hear the details, but to me when I have heard it, it stripes all the music from it. I apologize to all the Naim lovers… but I just have to say it.
Over the last fifty years pursuing high end audio I have slowly moved in the direction of where I am now. All tubed Audio Research gear, musical, rich with detail, midrange bloom and fantastic rhythm and pace. I could have gone others routes, Conrad Johnson, VAC, or Cary. If I have gotten anything from your post, I suggest you sit down and listen to a ARC, VAC, CJ, or Cary system and see if the music doesn’t take you away.
If I missed on the networking question… set me on the right question.