@larryi You write, "Maggies ... sound quite good when placed closer to the side wall than recommended, but, they do need space to the wall behind."
Agreed, that’s where they sound best. But I put my Magnepan Tympani 1a’s, which were 6’ tall and 4’ wide, just 2’ from some windows. With the curtains drawn, they still sounded good - not as good, I grant - but still better than anything else (with the possible exception of stacked Quad 57’s).