Hello. I am have ancient Sony home theater in a box where sub has finally died. Going to upgrade to a Sonos sound bar and sub. My room is about 16x16x13. The only place to put the sound bar would be in this middle shelf where the old speakers are. Is the top of the shelf going to be a problem with the up firing speakers of the arc? Will those speakers even hit a 13 ft high ceiling? Am I wasting money on an arc? I already have lots of other sonos speakers and play bar and love it in my bedroom. Also is the smaller sub good? It's half the piece of the big sub. Any thoughts would be helpful