You should contact Kudos Audio and ask how C10 works as center channel when turned horizontally? How is the tweeters dispersion when the speaker is turned, manufacturer knows best. Of course if you can have C10 vertically upright same as your C20s, then that would be most ideal scenario. Tv would go quite high then, but placed horizontally could work. Notice C10 shares same drivers with C20, so it would be best "match" tonally! Third C20 being even better (if Kudos would sell you them as each), but again you need either AT-screen that drops down in front of speakers or tv wall mounted higher. To give you idea how it would look: