Resolution, lumens, then contrast ratio in that order.

As far as fitting your room, you may need to make allowances for throw length as mentioned. http://www.projectorcentral.com/ has a good calculator. Being able to shift the image vert/horiz without key stoning may be important depending on your setup. I prefer motorized zoom and focus, as its easier to lock in a setting and not have your sub woofer knock it out of focus =p. Sadly, my current projector does not have this feature.


Get a project first for movies, 2nd for games. Gaming on the big screen is fun, but as mentioned, bulb life is $$.