After 1.5 years of constantly tinkering with my Samsung LN46A550 settings (mostly based off this forum), I finally decided to get professionally calibrated. That was 6-months ago and I still have to say WOW! I haven't had any desire to even touch the settings. Black is black, colors are vibrant and realistic. Whether blu rays or reality TV, the picture is joy to watch. After reading through many reviews on AVS, I sought Gregg Loewen for my calibration - and he delivered. He was prompt, knowledgeable, friendly and explained the process. Aside from the great picture, Gregg's work and explanations led me to gain a deeper appreciation of Films. I now recognize more subtle choices made by the director regarding lighting and wardrobe. If you're considering calibration, do it! You won't go wrong with Gregg Loewen.