Excellent advise from Tom.
On a rainy day after you think you have optimized the toe in/soundstage try continuing to turn your speakers inward crossing the axis of your speakers in front of your listening position to the same degree.
For example, in an equilateral triangle the degrees from a line perpendicular to the front of the speaker (its axis)to your head is 22.5 degrees. Lets assume you find that toeing your speakers in 10 degrees seem optimum, leaving 12.5 degrees to the head.
Now toe your speaker until the axis crosses your head by 12.5 degrees. What this will do, or at least can do, is to change the reflection pattern off the side walls and ceiling. It can give you a very focused but full frontal soundstage because, for example, the sound from the left speaker will not be reinforced by the side wall or ceiling surfaces. This would also allow you to move the speakers further apart and the listening chair further back should you desire and enhance even further the size of the focused sound stage.
Just a though about a road rarely traveled. But try it, it's free. With the dynamic speakers I have used I have never found a down side in medium sized rooms and prefer it.