This category encompasses a range of technologies and offers the best price-to-quality ratio for large-screen TVs. The two best options are liquid crystal on silicon (LCoS) and digital light processing (DLP), both of which use microchips to create an image that is bounced through a magnifying lens onto a transmissive screen. There's no danger of burn-in, but on the downside, the lamp needs to be replaced every five years or so, and that can cost several hundred dollars. The optics take up some volume, but these TVs are far less bulky than a CRT, and newer sets are getting thinner in order to compete with flat panels. Manufacturers are framing screens in thin bezels and concentrating the optics in the center, literally crimping the edges of the set. In the 42-to-46-inch range, you can save hundreds of dollars or more over an HD plasma TV; in the 60-inch range, thousands.