I think you should reconsider the screen size at 12' to 14' feet thats a small screen. Something in the 120" range would be much better. I never hear any body complain that they went to big. Hieght at 7' is a problem for some projectors but there are work arounds like screen closer the the floor or tilting the screen back, or you need vertical lense shift. I have a 110' 16:9 screen and sit 8' from screen with an HD33 might be to close for some but I love it as it fills my whole vision great for 3D.
"Smart enough to know better, to old to care" ------ Dedicated Home Theater, 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, 10TB DroboFS NAS