Jason -
I found the Dolby formula useful where the angle, from the seated position, to the speakers should be 45deg for HT & 60deg for Music. For a seated position 10' away from the TV or reference point in the middle of the speakers, the speakers would be 99.4" apart for HT and 138.5" apart for Music. With the speakers the same distance apart as the seated position is from the TV, the angle is approx. 53deg, right in the middle of the suggested points.
Apparently the 60deg angle for Music is supposed to open up the soundstage a bit. I've found that the 45deg for my M22's gives a huge stage.
Hope this helps!
Mike
