Ike13lol

I have a pair of klipsch belles that I love! Amazing for my music listening.When I listen to movies I still use them and they do a decent job because they are amazing Thinking of picking up a center speaker? Will it help? I hear 2 chsnnel doesn't do a good job of replicating a center but these aren't your typical walmart speakers lol Which one would match it best? 504c? Rc64iii?