Originally Posted by vangeliss
So there are no projectors that can do both ambient light rejection and deep blacks/contrast/color accuracy?
it's actually up the screen to 'reject' ambient light, that's a whole other topic in itself really.
but as far as projectors go...
to work in ambient light, a projector needs to be super bright. if it's super bright, that's a LOT of light that needs to be controlled inside the optics. the more light coming out of the bulb, the more light that reflects around inside the optics, as well as off the screen and then off the walls and then back onto the screen. both of which will increase black floor and reduce contrast.
in all honesty, the last time I went to the movies, I felt the black level at the commercial theater was terrible, and I have no doubt that my jvc at home had WAY deeper blacks. it's just insanely difficult to control that much light, even professional projectors can't really do it.
I think, if you want something with a decent compromise, you could look at something like the Epson 5030. in 'movie' mode the lumens drop, but it's got accurate color, and with the DI it gives you good on/off contrast and black levels. but, if you put it in 'dynamic' mode, the lumens jump way higher, at the sacrifice of color accuracy, contrast, and black levels. I'm not sure if it'll be bright enough for your needs even in dynamic mode though, but it may be worth investigating if you want a good movie experience.
another option that may have some success, is to use an ND filter on a bright business class projector to dim the picture and lower black levels. while not as good as a dedicated home theater projector, it can at least address the issue of light bouncing off the screen reflecting off walls and washing out blacks on the screen, giving a slight improvement in ansi contrast, but more importantly if it dims the image 10%, you get 10% deeper blacks. so you'd get your bright image for presentations, then put the filter in front and it'll improve movie performance. I look at this as kind of a Band-Aid solution though, not really ideal.
depending on how bright you really need the projector for presentations, and how 'high end' you want the movie experience, you may actually be able to get away with a DLP(I assumed you were avoiding DLP from your first list, and so haven't recommended anything that was) with a fast color wheel. the DLP's at this range will tend to have better blacks and contrast for watching movies, you may be able to find one that puts out around 2000lumens but still retains decent picture quality. a lot of ppl really like the benq w1070 for home theater use, but it's essentially a business class projector with 1080p resolution and good picture quality. I think they class it as a 'home entertainment' projector.
sorry I kind of rambled on there, lots of thoughts all at once, haha