After a certain point (90+fps), you need to just about double your fps to see identical returns.
You've seen 75hz, great. Go 144hz.
If you've partied at 120hz for a long time at 1080p, go 240hz.
At higher resolutions, you start to run out of options. 1440p144hz and over is a
small category.
If you care about colors and contrast, don't get a TN.
If you value maximum smoothness, don't get a VA or IPS panel.
DON'T.
Your best bet for high frame rate gaming is to
get one of the new ELMB panels. That's basically G-Sync compatible/Freesync and ULMB strobbing put together.
TFT did a review:
https://www.tftcentral.co.uk/reviews/asus_tuf_gaming_vg27aq.htm
Fantastic input lag. A little dim in terms of brightness, no HDR. Sync stuff is basically PC only, no real current gen Xbox/One X support.