There's a whole forum here dedicated to display calibration. You may want to check it out. You want the "super white" on the PS3 otherwise it clips WTW (whiter than white, > 235). You want to be able to see some WTW. You don't have to go up to 255, but 240-245 should ensure you don't clip any video. Get a disc like Digital Video Essentials or Avia. They have tutorials or explanations that help you understand how to use various test patterns.
larry
larry