Just want to share my experience, which can be different from others as the environment is different. My Oppo supports HDMI, optical and coax. I have a Firestick, a min and a pro. Firestick is the cheapest solution. It can stream video, and music is still enjoyable. The mini connected to optical sounds better than Firestick connected to HDMI. Connected to optical, the pro has a larger sound stage and more bass than mini. For the pro, coax is better than optical. Instruments and voices can be heard more clearly. I have mix feeling about connecting a LAN cable to the pro. It has more bass, but with 5G WiFi, the sound is cleaner and more relax.