Thanx. My listening area would be about 10 feet from the wall the speakers would be mounted on, so the triangle would work out about right. As far as the height is concerned, I realize that the mids & highs would go over my head if the speakers were to be mounted flush to the wall. I had planned on angling them downwards, keeping in mind the 40 degree dispersion of the drivers. I've always been pretty particular as to the placement & focus of my speakers, but, as usual, only a little experimentation will give me what I want. Unfortunately, placing the speakers at actual head level is not really an option if I want to separate them more.
Meanwhile, I'm far from disappointed with the sound, but, as all of you no doubt do, I'll keep looking for ways to improve it.