Classroom projectors come in all sizes and shapes these days and Epson has a pair of devices that show the range. Both use Epson’s signature three LCD panel technology to create the image and have all the latest ports and adjustments. The PowerLite S17 defines the entry level with a $400 device that can deliver 800 by 600 resolution with 2,700 lumens of brightness. By contrast, the PL 965 ups the specs in all areas, from its XGA resolution to its 3,500 lumens of brightness. It sells for $900.