My 2 cents: get your TV calibrated.
I bought a high-end LG OLED. The inputlag for gaming was corrected by 4ms from 25 to 21ms. Also, calibration really helps getting the best out of your (expensive) TV; even though my LG comes from the factory with ISF-ratings, red was 8% oversaturated and green was almost 6% oversaturated.
It took almost 2.5 hours for the ISF-expert to do all measurements and corrections; the TV is now spot on with all those fancy graphs you see in reviews.