I returned my ADP-170's -- the diffuse sound really didn't work well for me in my HT. I exchanged them for 4 more Atoms, matching the 2 Atoms I already have in the front L/R. The 4 new Atoms will be used as Rear L/R and Rear Centers. Is it reasonable to mount all 4 of these rear speakers in the same plane -- i.e., the same distance from the front of the room. Ideally maybe they rear L/R should be slightly forward of the rear centers, but...my room isn't ideal. I'm going to be mounting these on the ceiling (8') angled slighly down and towards the center of the listening position. Is this an OK arrangement? They will appear along the back of the room shown here.