I bought a BenQ PB6200 in April, and have loved the experience immensely. I get an effective ~90" screen size with the projector 14 ft away, and since the couch is closer, we've got a better-viewing-angle-than-THX-specs setup (45.2 degrees according to the
Viewing Distance Calc ). It seems almost silly going to the theatre, when the projector showing on our (carefully painted) wall takes up as much field-of-vision real estate as all but the biggest screens. The best thing you can do, though, is find a high-end AV shop and have them give you a grand tour in your price range. Pick 2-3 of your favorites inside that price range, and do some research on the finer details and issues with those projectors.
At 1700 lumens, the picture's still fairly visible even with the blinds open and without sunlight shining directly in, but the colors are washed out. Whatever projector you have, you'll want to either watch it at night or put it in a room with thick drapes.
Projector Central has plenty of info about projectors from beginners up through an intermediate level, and lots of good purchasing info, so be sure to at least check them out before making a purchase.