I think everyone will give me a hard time for sure on using the 61" tall SX-T2/R as the center speaker when I get the speakers and post some pictures. Both RBH and the dealer have already expressed concerns.
But I've already experimented using the T2 as a vertical center. And it sounded awesome as a vertical center.
As far as using more speakers (9+) for ATMOS, all I can say is "Quality over quantity".
Actually as imcLoud eluded, RBH could advertise the T2 as ATMOS speakers. Having five T2 would yield a total of 15 tweeters, 20 midrange drivers, and 10 subwoofers.
So it's like having 15 Speakers "built - in".