Potential home set up

Hi everyone,

Finally going to buy some speakers, went for monitors as I will also plug my laptop into them for music.

Before I go about buying this set up I wanted to put it past here to make sure I’m not missing anything:

Plex on web os lg c2

Speakers: Kali Audio LP-6 2nd Wave via pre amp

https://www.kaliaudio.com/lone-pine-studio-monitors

Plex has some issues on this tv, if a films audio is 7.1 the screen will go grey. 5.1 or stereo is not always available. Would I run into the same problem with the above set up?

Or will I definitely need to get a shield/Apple TV/fire?

Thanks!