You know, I don't remember if this came up before but as long as some of you are getting them at the same time, a couple thoughts.
If you are using a normal stereo (no delays etc) use a tape measure to place the R and L speakers the same distance (within an inch or two if you can) from the center seat.
When you're in the set up mode, moving things around still, with the narrower pattern speakers like the SH-50 /SM-60 and so on, BE SURE to try the speakers aimed so that they cross over in front of the listening position.
I have my SH-50's aimed so that the center of the right speaker is pointed at the outside edge of the left most seat (on the couch) and visaversa.
In commercial sound, one often uses the side of the radiation lobe to contour the loudness.
If you aim them like this, crossed over in front of the couch, it makes the sweet spot wider. This works really well even with just two channels.
If it happened to work out that the L and R speaker can be placed against the side walls on their angled side AND still point more or less in the right place, THAT is as close as one can get to outdoors and still be in a room, this works really really well especially for conventional stereo.
Have fun guys!