Sonimax is right. My TV is THX certified (and it looks great in THX mode, when watching a movie, of course), but however how hard I try making the Standard mode be the same as the THX mode, I'll never be able to do it. Even if I write down the THX numbers for each option available on my TV (brightness, color, etc) and choose the same numbers in the Standard mode, I don't get the same result. So I'm guessing those DVDs that help you calibrate your TV do help, but they most probably won't allow you to get the best looking picture. You need to know how to go into the more specific menus in order to modify the other parameters that are hidden. If you don't want to pay that much money to calibrate your TV, just opt for a THX certified TV like me! hehe