Newbie here.. Currently working on a 5.1.4 ATMOS setup and would appreciate any comments/suggestions regarding the speaker choice and placement. Working with: Yamaha RX-A3060 Sub - BK P12-300SB-DF Fronts - B&W CM8 S2 Centre - B&W CCM 7.4 Rear Surrounds - 2 x B&W CCM662 Atmos- 4 x B&W CCM684 Only fronts and sub will be floor standing. The rest have to be ceiling mounted. Is the ceiling mounted speaker placement optimal for this layout? Many thanks for any comments.