Hello,
The best settings are what looks good to you. If you want accurate, you're going to have to calibrate using a professional tool, not the cash grab cheap spyders and such. Theater/Cinema/Movie preset on displays is the most accurate to accurate, but due to the warm tones if you're used to blue white rather than white white, it's going to look a bit yellow/orange in the whites for a while, until you get used to it. I know that people are sharing "best monitor settings", for each model, however this is really far from accurate, but is a good start. What manufacturers do is take 1 monitor of a model, apply the cinema mode to it calibrated to what is the most accurate, then just apply it to all their other monitors. They aren't...