Like any electronic gadget or expensive device, home theater system also needs to be reviewed before making the purchase. For most of us, an HD projector is a one-time investment, so we need to be sure about the kind of projector we are buying. To know about projectors, we can browse sites such as HD Projector Review or read electronic gadget magazines. But the easiest way would be surfing the internet as you will get thousands of sites that will give you specifications and detailed information on each type of projector and its uses. So go through some of these sites before you buy a projector in the market.