Re: WHY CALIBRATE?
Do run the set for a few hundred hours before hiring someone to adjust it though to let it burn in a bit. Test discs get you most of the way there, but the ISF guys are far more proficient at set up than I can ever be and know how to tweak setting I am unaware of, and my TV maker has made it that way likely for a reason... Sort of like screwing with your BIOS on a PC.
Ken Taraszka, MD