John:
I don't know that I have much help to offer, but I figure if nothing else, I'll bump the thread for those who may have missed it.
Have you considered building and installing your own panels on the ceiling? I would
think...(I'm no expert) that some 1x2 framed acoustic fiberglass panels on the "ceiling angles" for the reflections of the highs would be easy. If bass is a problem (and it's not just falling out of the loft(!), it should be real easy to install a bass trap at the peak by "squaring off" the peak....if that makes sense...(?)
