I'm really impressed with these guys http://www.projectorpackages.com/

The owner is the man who designed IMAX screens. The prices are reasonable and the screens are supposed to be on par or better than Stewart Firehawks (an industry standard). They have pricing and different styles of screens available on their website and they have a number to call if you have any questions. I've called a couple of times and they are very knowledgable.

Good luck!

"We're on the island of Misfit Toys"