I've got a 55B9PLA. Overall very happy with it and have been using it with out the box settings for about a year. Having looked over some of this thread I've made a few adjustments so hopefully will be even better!
I have one issue. When watching football or ice hockey, particularly if it is on a streaming service, I find the ball / puck isn't clear. Its like it flickers in and out. Is there anything I can do about this or just an issue with the source (note: this are legal and office HD streams not anything dodgy!).