being selfish, i would place them in an optimal position to the 'best' listening position(which is where i would sit). i would think that due to the quadpolar design of the QS8's, placing them just behind the front, and just in front of the rear row will be fine. if you are really concerned for the listening pleasure of the people on the rear, then place them just behind that last row..to be honest, its really not something you probably need to fret over. the QS8 does such a great job of dispersing the sound evenly, that it will do well in almost any position.
your original idea will most likely work best. just to the rear of the front row.. just make sure thats where you sit
bigjohn
