We are a volunteer fire department building a brand-new fire station. I am looking to outfit our multipurpose room with a projector and screen. This room measures 40' x 40'. This projector would receive a signal from HD cable and also would like to be able to hook up a laptop for presentations. With a budget of around $2500 what would be a suggestion for a projector and screen. The screen can be fixed, electric, or pull down. Looking for suggestions on screen size, projector, and screen. Also where is the best place to purchase? Thank you!