I have Revel F208's and the matching center channel C208. They are far better than the CM10. I got all for about $5k. With a large room like that, the bookshelf speakers might not be enough. KEF speakers are excellent as well. Listen to a bunch, and see what you like. Just keep in mind the space you are placing them in. With 10 foot ceilings, you have over 5000 cubic feet of space. Consider your listening distance. A center channel will add a tremendous amount of detail to your listening, especially with regular TV watching. Also, you will need 1-2 very serious subs to fill that space. If you really do not care about base, I would forget the sub, get a vey nice set of floor standers with good woofers, and a center channel.