Baglorious, welcome. Reading your description, I'd be more concerned about the location of the M60s than the sub. You speak of putting them in an alcove, but how wide and how deep is it? If you're going to be sitting about 14-15' away, the speakers should ideally be separated by almost that same distance and also, their drivers shouldn't be recessed at all into the alcove. My thought is that the EP500(which is superb)should be in the alcove and the M60s outside of it, separated a suitable distance.
