I have a Sony x720e for my macbook for work and my PC for light gaming. It has graphics and gaming modes that have low input lags, but there is a really annoying quirk where when you turn the tv on it has normal (high) input lag until you switch to another mode then back to graphics mode. This means every time you turn on your PC (or plug in your laptop) you have to:
1. Turn on the TV
2. If necessary, switch inputs
3. Options -> Scene Select -> up arrow, down arrow
1 and 2 are annoying since monitors do that automatically but the TV doesn't. 3 is really annoying but hopefully is fixed in a firmware update...
Other than that the screen looks great.
I'm hoping for time to hack on an arduino with an IR LED to automate those steps, haha.