I already own all these films on a Blu-ray but the new 4K and especially the DTSX sound track remix totally eclipses the previous discs. HDR also adds sparkle and realism. My system is a 5.1.4 with height speakers placed high in the room's four corners, I find this works well for both ATMOS and DTSX. The DTSX soundtrack is a joy to listen to with sounds accurately positioned around the room and overhead, wonderful bass and clear dialogue.

I've been dissapointed with the audio on these movies in the past but now can say they finally nailed it. I have a 7.1.4 set-up and the sound puts you in the movie and is coming from all directions. The ceiling speakers get a great workout and it makes the movies feel like the magic is happening all around the room when and where it should. Worth the upgrade

Dont bother buying. Very grainy textures. I did a 'side by side' comparison of the same movie same scene, between the 4K and a 720p low bit rate torrent download.... the download was slightly better!!!! Some movies shouldnt be put on 4K. Wish I had done my research first. Google it - it's a known problem.