ethernet connection for Netflix amazon etc.

Neither is the right solution.  First, HT processors don't have video streaming apps built in for stuff like Netflix, Amazon, etc.  Some will have internet audio streaming apps for Pandora, Spotify (the MX122 does).  Second, doing the streaming using TV is good for video, but audio quality will take a dump. 

You are best off looking to get a dedicated streaming device.  The streaming device is just another source like a Bluray player or a satellite receiver.

For the cheapest ones, look at Roku or Amazon Fire TV cube.   If you are planning on streaming Amazon, do not get an AppleTV.  Amazon has limited it's Apple iOS player to only 720p and stereo audio (their way of influencing customers to buy their FireTV instead of AppleTV).

If you want a better quality streaming (especially for audio), you can look at the higher end media streamers such as Zappiti or Zidoo.  The more expensive models even have linear power supplies (which further improves both the video and audio quality of stuff over HDMI).

Ok.
Thank you

auxinput would you mind explaining why say Zappiti would be superior audio/video vs my present connection sceme: ethernet to OLED from router (for video) and OLED arc via HDMI to A/V processor (for audio).  If it makes a difference the OLED is the 2019/2020 LG C9 OLED.
Please advise.
Thank you

 Is it better to connect direct vie ethernet to TV or to A/V processor

Like aux mentioned, I don't know of any AVR that has a streamer for video built in. 


The biggest issues for me have been the compatibility of the Audio Return Channel (ARC) , as well as 4k support.  I end up re-setting one component or the other to get ARC to work unless I leave everything on all the time.For this reason, using the TV's optical out has sufficed.

If my HT processor was 4K ready though, I would move all my inputs over to it, and use the TV's optical out to connect to my AVR for off-air channels.


Best,
E

I suppose you could try using ARC.  However, ARC and eARC uses one single-ended data wire in the HDMI cable (usually not even a good wire).  Whereas HDMI audio from a streamer source uses the combination of the four fully balanced HDMI signal wires (these are the important wires and are usually much better engineered in an HDMI cable).  The power supply and digital circuits in the TV are usually not as good as something that is in a Zappiti or Zidoo streamer. 

The ARC and eARC stuff was developed more for people who just want to mount a TV on the wall and expect it to "do everything".  Also for people who want to simplify and consolidate their systems without any concern for sound quality.