IMO, good speakers for music are also good for movies, if they can handle the dynamic range required with some action movies.
Ideally, you should be able to compare them with a musical source that you already like. If you can hear the two which would be used for the front left and right channels, in a hi-fi store with one or two of your preferred CDs, that would be the best situation. Speakers used for surround and Atmos duties are not as critical in a system. Also, If a store offers you the option to try and return them should you not appreciate their performance, that would be great.