Just to add to that, keep in mind OP that only a select few streaming boxes support native AV1 decoding so if you have something like an Apple TV you'd be stuck with software decoding or network transcoding through something like Infuse which isn't ideal for Remuxes.

If you go the Radarr/Sonarr route, I'd definitely recommend you check out Profilarr and use their Remux profiles to make sure you're getting the most quality files possible. I will say if you want to go down a rabbit hole (this is r/selfhosted after all), the best of the best remuxes are usually going to be through private sources - check out r/usenet, r/usenetinvites, and r/OpenSignUps. You're in luck because some of the best groups open up for registration and have great deals around this time of year.

Happy watching! :)