I have gone the projector route too, for many of the reasons expressed above. Additionally it means I do not have a horrible piece of plastic and glass between the speakers and ruining the aesthetics of the room. I went for LCD simply because I could not stand the DLPs I tried. You may not suffer from rainbow effects, but if you do it is way more intrusive than a screen door effect. Even if you do not see the rainbows, then the reason is your brain is managing to process the images fast enough for you not to to be distracted by them. All that effort by your brain turns into fatigue, and for my kids it turns into migraines after about an hour of viewing. Regardless of anything you might say that is negative about an LCD, it is so gentle on the eye and brain that you can watch one for hours without any sense of fatigue.
