My m100s are sitting about 8 feet out from the rear wall and 6 feet in from the side walls and 15 feet between the towers, slightly angled to the MLP

LFR1100
VP180HP
EP600
M3 In Ceiling x 4
M5OW
M2 - Atmos rears
ADA1500.5
M3 Outdoor Speakers
ADA 1000.8