The center channel plays a very different role for movies than for music. My (good) system is used only for music, and my center channel is identical the the front left and right, consisting of a custom two driver subwoofer system and MG1.6 planar speaker. For music, the center channel is most important and should be as good or even better than the others. Obviously there would be no room for a video screen.
For movies, the center channel is mostly for dialog. A superb full range speaker is not the best choice. Dialog is more easily heard and understood if the frequency response is restricted, and shaped to emphasize a certain range.
For movies, the center channel is mostly for dialog. A superb full range speaker is not the best choice. Dialog is more easily heard and understood if the frequency response is restricted, and shaped to emphasize a certain range.