Another solution may be to listen in the nearfield, minimizing room effects. Granted, this won't help you in the low end that much, but from the midrange on-up you'll be fine and imaging/soundstaging will be near perfect. Even though I have a rectangular room dedicated to my system, it is too small too listen any other way w/ my speakers, which like to be at least 8 feet apart.
Room acoustics - yet again
I have the books and the theory of room acoustics for rectengular enclosed rooms. Any guidelines for irregular (ie partly-cathedral ceilings, multiple openings to the listening room) ? Or is it the usual measure-listen-change ? My problem is finding a reasonable starting spot and tewak from there.