I looks like you could easily mount the projector to the rear of the ceiling beam using a ceiling mount with an extension pipe so that the projector's lens (center) is located approx. 12 inches below the ceiling. I would paint the drywall covering the beam a flat black to avoid any chance of light scatter/reflections. As for projectors the BenQ W1070 will not work for this projector/screen setup since even though it has a little amount of lens shift adjustment it still must be mounted several inches higher than the top of the screen. So to use this projector you would need to lower the screen a few inches.
The Sharp XV-Z30000
and last year's Epson 5010
(or just about any of the current Epson home theater projector models except the 3020) have wide range vertical lens shift adjustments and would work with this mounting location. As for the video input lag for gaming, the Epson 5010 was measured (HERE
) to have a long 80 ms of lag while the Sharp has in the range of 60 ms to 70 ms of video input lag (measured HERE
). Depending on how serious a gamer you, are these projectors may have too much input lag for you (or not). Another projector to consider is the BenQ W7000
which is now a two year old model now available for under $2K (a replacement has not yet been announced). It has a relative short input lag of around 35 ms (measured HERE
) and includes a lens shift adjustment that should work with the above described setup. For a given screen size the BenQ W7000 requires a longer throw distance than most other projectors and the minimum throw distance for a 100 inch (diagonal 16 x 9) screen is just under 12 ft. that that should also work for the above proposed setup (with a throw distance of 12 ft. or perhaps a little more).
.Edited by Ron Jones - 6/10/13 at 10:53am