4DHD, the pronlem the OP is having is visualizing the placement of the surrounds, not the fronts.
Until the house is built or they have a 3d rendering of the space, all we can do is throw out ideas.
I ran into the problem that due to we have a archway that separates our living room and dining, that I could only go about 16" out from the corner and went 58" up from the floor. I am usung Klipsch RB-41 ii for my rears and have no problems with the sound footprint.
Once you leave the footprint you can tell. As for the OP, it is getting the Sig. other on board, due to no matter what, they believe that anything larger than the bose soundmates are too gaudy.