THIS…is a really good question. Think about it–there are all sorts of projectors and projector screens out there, and they come in all different shapes and sizes and reflectivity rates, but really; just how big do you need?
Of course, there are always those people out there who scoff at such a question and say “the bigger the better, duh!”, but for those of us who don’t simply think in terms of THE BIGGEST, the question becomes a valid one. The only question that you really need to bear in mind in terms of screen size is this:
What row do I want to sit in?
Once you have that question firmly in mind, you’ll be able to make your necessary considerations for screen size. If you normally sit in the front row of a movie to catch all the grains and pixels, then you’ll want a big screen set close to the chair, just like in the theatre. But if you, like me, prefer the “catbird seat” right underneath the projector in the farthest row back to catch all the action in general, your screen likely won’t need to be quite so big.
So when you’ve figured out what row you want to sit in, you’ll be one step closer to figuring out your exact home theatre setup.