Thinking of getting a Panasonic AE100 - how far off centre can I project (to avoid ceiling light with ceiling mounting) at 9 feet from screen? If we need to offset by more than 3 feet to the right would we be better off with a Cinezza - as Sony make a big deal of it's Keystone correction abilities. Also, how can I calculate the minimum screen size I can produce at 9 feet? I'm concerned that the projectors wide angle lens may mean that it has to be brought forward to project our desired 50" image. Thanks a lot for in advance for any advice.