That depends on the types of games that you play. Both monitors will work fine with your system specifications but if you're more into multi-play games i suggest that 1080P 144Hz. If not, let's say for offline games where the FPS doesn't matter that much so only reason to go for good monitor is to maintain a quality image where you might consider 2K one with less refresh rate.
Playing a game at 60 is more than enough in my opinion unless playing in competition environment so according to my point of view i think 2K one much worthier over the other in general