I have a Mitsubishi WD-57733 DLP rear projection unit, and im trying to get the best possible image for my hdmi-connected xbox 360. I want to know what black/reference level to use; standard or extended. so basically, im need to know the color range of my tv (0-255, or 15-235). Ive called technical support, browsed the web all to no avail. any information would be extremely helpful!