Fiber or Eithenet

That long a run get a quality Media Converter like the Sonore Optical Module. https://www.sonore.us/opticalModule-Deluxe.html

Finisar SFP FTLX1475DFBCL and LC-LC-SM-DX-0S2 Corning Fiber. https://www.amazon.com/Fiber-Patch-Cable-Single-Duplex/dp/B00T89DIQW/ref=asc_df_B00T89DIQW/?tag=hyprod-20&linkCode=df0&hvadid=693418895745&hvpos=&hvnetw=g&hvrand=2785120018893449731&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1026899&hvtargid=pla-353208159507&mcid=de49865fd06b37f29def0e7ae4fca560&th=1

@testrun I am running the Sonore Optical Modules also and had a 75 foot run to my listening room. Pulled all the CAT5 out and ran with CAT8. During covid said the hell with it, pulled OC Fiber and the difference was night and day. Also people are recommending CAT8 cable and it is shield tied at both ends. I prefer CAT8 but use Telegartner unshielded RJ45 connectors as a drain so I am not getting any RFI/EMI from the cable and the drain direction is going away from the switch   . https://www.telegaertner.com/en/online-catalogue-datavoice-office/modular-plugs. in my entire network for my listening room I may have 6 meters of CAT8 from my cascaded switches to my Sonore OM. Hope this helps. You can PM me with any other questions on my setup.

Yes I am running all fiber and using cat8 between the switches. I am fiber copper fiber. With Quality media converters and SFP like you have in place you will not have any sound quality issues. Some have issues by using cheap Amazon converters and SFP. With CAT8 it is shielded at both connectors and can cause your cable to become and antenna for RFI and EMI, that is why I have a drain by un shielding the downstream connector, no transmission into my streamers or switches.