The Panasonic PTD4000U projector is a 4:3 chip with 1024x768 resolution, 38DB fan, 4000 ANSI lumen, DLP projector with 1600:1 contrast. The Sony 15 at a fraction the price is LCD, 1100 ansi lumen 16X9 chip 1280X720, 12000:1 contrast and fan moise in the low 20s. For multimedia especially in large rooms where light can't be controlled the Panasonic would be a better choice, even at 3 times the price. For true home theater in the home the Sony will blow it away.