Oh, I probably should thow out this since I'm an advocate of big screens. Be sure you can get enough output on the screen for the chosen size. The general rule of thumb I've seen is around 15 foot lamberts, but I'm seen some talk about as low as 10. I think I saw in the past that some plasmas are in the 40-50 foot lambert range as a way to put this abstract number in perspective.
Foot lamberts are calculated with this equation.
(Projector lumens * Screen Gain) / (Screen Height * Screen Width)
Notice that as the screen grows it rapidly reduces the foot lamberts you are getting. Another cause for concern is that most mfrs inflate their lumen output figures (sort of like AV reciever power ratings). I've seen some say that you should really figure only like 60-80% of what the book says after its properly calibrated and the bulb gets some age.
A highly reflective screen will help make up for a lower output projector, but remember there is no such thing as a free lunch. A higher gain screen gets more light inside its viewing cone, but outside that cone it will be much less (think of a magnifing glass in the sun used like a lighter)
When I was looking a little over a year ago the hot high gain screens were HighPower and the SilverStar. I'd have loved a SilverStar, but at the time they were as much as (or more than) my projector for the size I wanted.
A lot of people are happy with DIY screens, but I'm not sure that you can really get the gain you need to go big that route. I'd have probably gone that route, but there are two windows (totally covered of course
) in the front of my room so I didn't have the flat wall space required.
