I sound like a broken record but i find FPS games now unplayable without 240 gsync. Have a look at the Gigabyte Aurous 240hz on pre order at ocuk it is one of the new 0.5ms panels so it will be a bit better than the first gen i had for a while and works with Nvidia or AMD.
My original 240hz broke and i have been waiting for like a year for these 0.5ms panels so thats how highly i rate it, Well worth a try on DSR terms. You will find the blur also is about equal to the tech Eizo used to strobe also.
I have found that dropping the refresh rate to 100hz has cured my eyestrain.
I tested on the dell 144hz tn also by dropping to 100hz and found the same to avoid placebo.
Strange, it may be that since having my eyes lasered that I am just more susceptible.
In other news the monitor works fine with the 2070s fe in gsync compatibility mode.