For our review of the Samsung JU7500, we calibrated the picture settings of the TV. These are our results.
Simply setting the picture mode to Movie does most of the job. You should do this even for watching sports. For video games, though, turn on game mode (under System-General) instead.
Our settings are relatively dark. If you want something brighter, increase 'Backlight' as much as you want. This won't affect the picture quality.
If you want the soap opera effect, turn on 'Auto Motion Plus'.
We always recommend turning off 'Dynamic Contrast' on all Samsung TVs.
The above screenshots show the color space, as well as the white balance calibration. This varies by unit, even within the same model and size. You can try these values, but they might not be perfect for your TV.