I agree with everything AV stated above but the off set of the Mits. It has a very large off set and at 110" screen it must be about 9" above the screen and it increases with screen size. The lens shift adjustment is large but only in the direction of increasing the off set. I believe anything larger then 120" with an 8' ceiling would put the screen very close to the floor.
"Smart enough to know better, to old to care" ------ Dedicated Bat Cave Home Theater, JVC RS49U/Mitsubishi HC7900DW Projector, 110" 16:9 Jamestown screen with variable power masking for CIW 2.50:1 to 16:9, Marantz 7009 with 7.1.4 Atmos with Ohm mains,3 DIY Subs (2 15" (1 ported, 1 sealed and a 12" 4th order bandpass), 1 DIY butt kicker, Custom Built HTPC, 18TB DroboFS NAS