Can't help you with the picture settings. My unit has bad flash-lighting in the upper left corner.
Black levels are pretty good considering, and shadow details seem ok. Other picture quality details are ok. There is some 'banding' visible at times and the colour uniformity, although not perfect, isn't bad. I can see some un-even lighting in the other corners, and if they were all like that, I could live with it, but the upper left corner flash-lighting is terrible. Now I have to decide whether I return it and try another or cut my losses and pony up for a plasma instead.