Currently sticking to scene 1080p BluRay rips, but I do compare the version I have with whatever iNTERNALs or REMASTEREDs are released. Newer isn't always better. I only upgraded my Plex server last year to be able to handle all the simultaneous 1080p transcodes I'll ever need, but I really want to start upgrading to 4K for archival puproses. Unfortunately Plex isn't able to tone map HDR to SDR yet, which means I'd have to maintain a second library with 4K content and waste space on duplicates. So I'm holding out for now ...