I may be late here, but thought to add this to the suggestions. There may be critisism for this suggestion but I remember experimenting years ago with wall proximities on certain loudspeakers, including the no-go area of corners, just to see what variables occurred, (this was a long time ago and early on in my days with messing around with equipment), but if having the speakers hard against the wall and inverting the phase of both speakers, which does the inevitable with the diaphragms, it alleviated the cancellation effect with the bass and brought about more depth to the soundstage. However, this was with a pair of infinite baffle Celestion Ditton 44 enclosures on stands. Playing across the width in what looks like a pretty safe room, free of highly resonant surfaces or structure should rein-in the strong bass your set-up (I imagine) probably produces in less than ideal circumstances, but this simple experiment may be worth trying once you have adjusted to the sound with the system in it's standard set-up first.