The LOTR UHD release looks spectacular.

Mad Max Fury Road is the way to go.

John Wick 4 was absolutely stunning to watch on 4K Blu-ray

Congrats! I'm in a similar position, recently acquiring a 4k player myself. I've been assembling discs as I've come across deals. Movies which I think really benefit from the 4k treatment include:

• Lawrence of Arabia. Ideally, the first time anyone sees this movie would be on an IMAX screen. My first viewing was with 720p DVD rip watched on a cracked tablet screen, and it was STILL visually impressive. Watch it on a scale commensurate with the story itself, and it's quite possible some sequences will take your breath away.

• The Magnificent Seven. Similar vein as Lawrence (sweeping widescreen shots of desert locales), but a little grimier. The whole image has this really lovely texture and vivaciousness to it. I particularly enjoy the latest releases new color grade, which lends further vitality to the picture, emphasizing the panoply of color in many scenes through increased saturation and dynamic range. It does not tread into cartoony, Technicolor excess though, instead feeling "just right" to my eyes. Like how I remembered the film looking, rather than how it actually appeared on my old DVD release of the movie. --> Addendum to the above, the Criterion release of Seven Samurai is also worth picking up. It a perfect example of how good an "old" black and white movie can look.

• Blade Runner. It's a movie driven by vibe and aesthetic as much as plot, if not more, and the clarity of an HDR 4k picture enhances those features. Those aerial shots of LA, where you can see every little detail of the miniatures, down to each individual window of the Tyrell megastructure, are, again, breathtaking.

• Alita: Battle Angel. A 21st century update of the cyberpunk aesthetic, but looked at through the maximalist lens of anime/manga, as opposed to the brooding noir tone of the Blade Runner. I don't know when the next time we're going to get Jim Cameron levels of production value in a cyberpunk setting any time in the near future, so I appreciate being able to pick out all the little details in the background of the frame, as well as the heightened impact of the crystal clear action sequences (thinking of the rollerball death match race sequence in particular).

It's not out yet, but The Fall is a stunning movie that should look fantastic in 4k.

Not a movie, but BBC earth series (ie Blue Planet, Frozen Planet, etc) look amazing in 4K. You can see the scales on octopi and feel like you're underwater with the fish.

Interstellar is a great choice if you do reconsider. The visual effects when they go through the wormhole are a stand out.

The Abrams Star Trek trilogy.

If you're a fan of animation and don't mind gore, Castlevania is available on Blu-ray. I just watched all 4 seasons. Some of those scenes are just incredible.

I would just add that if you feel inclined, always research what 4K you'd like to buy next by reading reviews and using sites like https://caps-a-holic.com/ to compare old blurays to the new 4K editions.

It's rare but just because it's a 4K release, that's not always a guarantee that it will be better. Some filmmakers like to use the opportunity to change the way the film looks entirely. Also, some filmmakers are using AI to improve the picture quality (cough! James Cameron) and it doesn't always come out the best. In other words, stay away from True Lies in 4K, it's awful.

If done properly, older films can look wonderful, such as Top Gun, Back to the Future, and Who Framed Roger Rabbit? Yes, I own those. 😁

I would recommend Wild Robot or Transformers One for more recent movies. In my opinion they look fantastic in 4k and are both great movies.

Too much stuff

-2001 is absolutely stunning

-OG Alien

-Matrix Resurrections looks gorgeous and is an underrated masterpiece

-The Boy and The Heron and other Ghiblis

-Avatar 1 and 2

-Coraline and other stopmotion masterpieces

-The Lighthouse and some other infinite great B/W

Ready Player One Alita Battle Angel Into The Spiderverse Across The Spiderverse Pacific Rim Kong Skull Island Dredd

These are just fun to watch.

Saving Private Ryan