Should I choose stereo or Dolby 5.1 for my audio? I have 3 speakers, left, center, right.
is that integral to the TV? or a separate receiver/soundbar? HDMI properly connected devices ID themselves to each other so the automatic setting is preferred.
I'd pick 5.1. That way you'll get dialogue in the center speaker where it belongs. There's usually not much content in the rear channels and your system will probably mix it into the sides.