Karen, I got an Epson from Office Depot which I waited to go on sale for around $300. The pic is good, but no go on the built in sound. If using outdoors, you really need to use a receiver and speakers in order to hear good. I had an old receiver/speakers not being used, so that wasn't a problem.
I really like the screen I got, which is a Camp Chef OS-144. Camp Chef makes several different size screens. Here it is on Amazon, which I also got on sale for around $180, I think. What I really like about the screen is it has a removable back panel, that let's your project from the rear. The Epson have a setting that reverses the image for rear projection. When rear projecting, nobody can interfere with the projection when they get up and move around in front of the screen.
http://www.amazon.com/Camp-Chef-OS-1...outdoor+screen
We just discussed this recently in another forum. let me see if I can find it, cause it had other projectors and such in it.