What Randy said was true. I'd play around with the settings first and see how they interact with each other. It's a great way to learn about your new set. You can always get a calibration disk and at the very least, set the basics (contrast, brightness, aspect, color, etc) and get it even better. You won't have a "calibrated" set but your pq should be better than default. Just write down first what your settings are so you don't end up like Randy (myself and others included) screwing things up. And to your question as to differences between the same model, yes, there can be a big difference so that's why using someone else's settings is not always a good idea in case that's what you were thinking. Component variances, viewing environment all play a part in calibration.