Hello @audioman58 , I have done many things to maximize the sound of my streaming. I have no fibre.
All network cables upgraded to Supra Cat8. not expensive. There are other options discussed by @lalitk for upgrading ethernet cables at reasonable cost.
Network Acoustics Muon Pro System. noticeable improvement.
JCAT M12 Gold Switch with JCAT Optimo 3 power supply. Big improvement, I needed a switch anyway, and this one sounds fantastic. I tried Bonn 8 but it was not impressive. I first had only the M12, and I easily heard the upgrade. Then I added the power supply and it was even a bigger difference. Both are up for sale on US Audiomart from someone.
I formerly had EtherRegen, but the switch and the Muon easily made this obsolete.
Also the addition of the M12, with it's included cables replaced the short Supra cables. I
Anyone who has said the switch makes no difference has likely not heard the impact of the M12 with good Power Supply in a resolving system.