I LOVE my QLED Q80T.
The local dimming helps give impressive black levels.
It's almost too bright at night. Especially in game mode. I'm sure I could tweak that.
Has a few annoying smart features, but it is impressive.
My only reservation with OLED is burn in. I had a plasma TV, so used to it. But it was a lot of work to stay ahead of burn in, and ghosting could be fixed with a white bar pass by. Not sure OLED has any tools to mitigate burn in.
Just avoid static images for long though. Gaming and some sports or ESPN becomes a problem.