I heard from others that having 120HZ-144HZ does make a difference in not only first person games, but also a certain smoothness in Windows. Well today I got myself an Asus vg248qe and I'm blown away, although I didn't realize I had to buy a Dual Link - DVI and had to set up my calibration as on default it's awful. Still though.. I'm much impressed as everything is so clear, smooth, precise and I have noticed a K/D improvement in Battlefield 4. It's almost as if my previous monitor of 60HZ 5MS + Vsync had a laggy effect.
It did take a bit to get used to at first almost a bit of nausea.
But the biggest thing I've noticed is playing Battlefield 4 without Vsync with no tearing, AT ALL! With my old monitor it would tear all the time, it was awful had to put Vsync on with every game
My score? 8/10 just based on the naff default colours which needed a good calibration.
EDIT : Ooops needed to be in Monitors
It did take a bit to get used to at first almost a bit of nausea.
But the biggest thing I've noticed is playing Battlefield 4 without Vsync with no tearing, AT ALL! With my old monitor it would tear all the time, it was awful had to put Vsync on with every game

My score? 8/10 just based on the naff default colours which needed a good calibration.
EDIT : Ooops needed to be in Monitors
