TYTSoldier :
VincentP :
From a 120 Hz or 144 Hz monitor you can expect smoother more responsive motion.
From a higher resolution monitor you get better pixel density and generally better image quality.
You can have both - Asus ROG PG278Q
That one is out of my price range, but thanks for the recommendation. I was considering going with the ASUS VG248QE since it's $250 or spending $250 more on the 28'' Samsung 2160p monitor.
I definitely wouldn't recommend this Samsung. They have brought it out as a very cheap 4K monitor. The image quality isn't great. On top of that, computers aren't ready yet to play games at 4K. You would need at least two high end cards in SLI.
The PG278Q is expensive.
You will be looking at a 24 inch 1920 x 1080 120 or 144 Hz display, or a 27 inch 2560 x 1440 display.
I would lean towards the gaming monitor.
Have a look at the BenQ XL2411T.