Here are a couple different options from what I’ve read from far wiser posters here. You could replace your current CAT 5 cable with this…
and maybe get some good benefits just from that. But, and if it’s me and given your system, I’d run a Mesh system to your listening room and run a Vodka or Wireworld Platinum Starlight from that Mesh node to your excellent streamer/DAC. That’s what I’d do FWIW, and best of luck.