I for one am not trying to abuse you. I do understand that this is a family room build, but I stand by what I (and everyone else) said.
How about this for a compromise? Set that TV in the corner on a temporary stand and watch it for a couple of weeks before deciding. Then move it center wall and try that for a couple more. Don't commit expensive mounts and in wall wiring until you have it worked out. Or just go do whatever you want. Your room, your choices.
On the brightness thing - how could I know? 90% of people just leave the damned things in torch mode, so it was a reasonable assumption, especially since you were complaining about brightness.