oudmaster :
great info thanks,
so better is to play next two years on full hd monitor and ultra settings and then wait for a better solution for 4k resolution !
I think most of the suggestions were to choose QHD (2560x1440) for now. Full HD is only 1920x1080.
These are pretty much your options (my examples are all 27 inch monitors):
1. 1920x1080 monitor, 1 to 2 ms response time, 120 Hz or 144 Hz refresh. This is the best option for reduced motion blur and input lag. These use a TN panel which has faster response time but picture quality and viewing angles are not as good. Examples Asus VG278H, or VG278HE, BenQ XL2720T or 2720Z. You can also get 24 inch versions of these monitors which will look better because of the smaller pixel size, but...