FWIW, "roughly" optimal position is not an oxymoron. We can call it "nearly optimal" if you prefer. The point is that if one is using REW for SPL and Impulse, there are various levels of precision one can get -- within 8 db, at this or that frequency, or this level of smearing reflections above -20 db. If you have not used REW, you don’t know what I mean, but when one is trying to make sure "most of the notes" are there -- and not too "peaky" AND one is trying to avoid a level of reflection which would damage the accuracy of sound stage imaging, there are any number of compromises and different degrees of accuracy one could accept in order to go back to listening. It’s an iterative process - listen, measure, listen again.
So, you can see that I’m not in the "walking around the room, clapping" camp, nor am I in the "optimal is simply one thing" camp. This is a complicated, iterative, measuring-and-listening process -- even for one speaker -- so adding a second speaker in, of a different kind (tower not stand mount) makes it even more complicated.
And please don’t tell me I’m over-complicating it. You can say, "That’s too complicated for me" if you wish. But I hear the results of this process and they exceed by a large margin trial and error.
rbstenho -- I can position things in many places. My WAF is that she wants me do what I want. But I'm curious what others do when the are bound by a more constrictive arrangement, just in case I decide to move to a room that has more limitations.