A dedicated streamer, keep the PC out. The better quality the streamer (as all audio components), the better If your system is too far from your router modem you can use a wall wart wifi extender and a short Ethernet cable from there to your streamer. My systems run this way (see under my UserID.
Ethernet connection for best sound quality
As far as I'm aware of for streaming audio with tidal hi fi plus ethernet. I need; besides modem and router.
1) A Streamer
2) A ethernet card specifically for audio jcat or matrix if I use my computer
3) Shielded ethernet cat 5 or better cable
So from wall to modem to router to streamer to dac, correct?