If you are looking for good discs for planetarium, the main thing is the quality of projection and the variety of themes. Some discs show just the starry sky, but there are also discs with whole galaxies or rare cosmic phenomena. It's better to take those that are compatible with your projector model, so you won't miss. By the way, here you can see different variants - there is detailed information on discs and their characteristics: https://astronomix.info/planetarium-discs.html