While my setup is a little different than yours jbhiller, I agree using the fiber optic SFP module is the way to go. I was using wifi for months before trying SFP and while it sounded very good then, it sounds fantastic now. The biggest difference I observed is in detail and image retrieval. So much so I am now listing a lot more. Turning off the WiFi hardware in the T8 probably accounts for this improvement along with severing any electrical connection to the network (no ethernet).
Do make sure you disable WIFI in the networking menu.

