Hi @Matty_J.

Thanks for reaching out and welcome to the community! Let me check it for you.

Sonos usually refrains from recommending 3rd party products. However, you can check our support article that outlines the main factors that determine if your Sonos Arc can play Dolby Atmos audio. 

This indeed can be best answered by those who are also using exactly the same devices, and hopefully, someone who does will stop by and be able to help you.

Furthermore, some of the community members might provide their own opinion about this anytime soon.

If you have any questions or concerns,  feel free to reach out.

Nice telly. Personally I'd go with a Sony. I suspect a telly and player of the same brand will always talk to each other better.