ChopOMatic

I found a similar topic on here from December, in which @dwilawyer mentioned the possibility of the museum having some suitable speakers for sale, as a result of a donation. I'd be interested in anything suitable along those lines, and would appreciate thoughts on whether the pendant approach is the best solution for this room. (i.e. Would I lose a lot of the Atmos effect by going with height-mounted speakers on the front and rear walls? Huge TIA... Chop