You should be flexible about the Hales. If you can get them to work, fine, but if not... Three big issues will present themselves. First, can you set the speaker to listener distance great enough for the speaker's drivers to coherently integrate? Can you position the speakers far enough into the room for them to throw the soundstage they are capable of? Will the full range nature of the speakers over excite the bass modes of the nearly square room? If only one of these problems is unresolved then you won't have high end sound. If two are left unresolved you won't even have good sound.
Best of luck!
Best of luck!