For short runs Quality Ethernet cables Are around $1k x 2 sonically better then fiber optic I have tried the best fiber optic and plug in modules
fiber loses its naturalness compared ,I am referring to a quality setup
and a good LPS power supply to the morer-router, if you have older separate units
get rid of them I bought a Motorola 8702 superior in every way 1 less power cord ,1 less Ethernet cable . The Linear Tube Audio 12v up to 8 amp at our audio get together compared up to $1200 Paul Hines units ,the Linear tube audio at $750 is by far the best best internally as well as sonically with a excellent DC cable to the router that the competition charge $150 extra , I also put in a synergistic purple fuse, and use a decent Pangea awg14 sig mk2 power cord , and a much better switch Jays audio and Alvin at Denafrips teamed up with their SW-8 Ethernet switch which has a Tumora LPS ,low noise regulators and a over controlled clock ,for around $600 an excellent value and another step for very good streaming . Everything counts in the audio chain ,being a dedicated Audiophile doesnot come cheap around $4+k just to get here the next upgrade the T+A 200 dac which is a bargain at $7200 retail price we have compared pretty much everything up to $15k, the T+A is very balanced. Myself have to save for my 🎅 🎄 Xmas present my pockets are not that deep.