Magnepan's are best in a rectangular room, and one larger than yours. I would speculate that you will have some strong room modes with any speaker that has any bass output. One wall where the dimensions are 15L by 15W by 15H will create a big problem.
Do you have a system in this room now? If so, how does it sound to you? I would think a pair of small 2 way stand mounts would offer a better match to the space.
Do you have a system in this room now? If so, how does it sound to you? I would think a pair of small 2 way stand mounts would offer a better match to the space.