My existing L/C/Rs (Atlantic Technology 727 in-walls)

My proposed surrounds (Atlantic Technology 14 in-walls, although I'd like something with a sealed enclosure)

My proposed room layout

The plan has changed slightly, but this is a fairly accurate representation of my room. After reading this thread, I think I would benefit from the following:
-slide the two side surrounds from behind the first row to directly beside the first row, and place them approximately 2' above ear height. Currently, they are shown at the Dolby & THX recommended 110 degrees from screen centerline, but I believe that is better suited for monopole configurations.
-set the two side surrounds in dipole mode
-to work with existing wall framing, I will need to place the two rear surrounds closer together than shown. Since they will be fairly close to the rear seats, would these work better switched to bipole? I guess I can experiment.
Because my back row of seats is on a 12" riser, I'm not sure whether to keep the side & rear surrounds at the same height (2' above 1st row ears) or set the rears 1' higher to keep them 2' above the rear row ears.
Appreciate the feedback.