I’ll reiterate some variations of similar speakers here, having owned a few Atma-Sphere amps myself. The Quad ESL 2805 electrostats would sound sublime in that size of a room since they won’t reflect too much off the side walls, and you should be able to easily give them 48-60 inches of breathing room from the front wall.
For Devore, I’d suggest you look at the O/93 as well. They are just simply lively, dynamic, and transparent.