For those games, I think you'll be fine at 1440p. Youll be able to ultra/60 fps them. Other, newer, more demanding games, you'll have to dial back @ 1440 to get 60 frames or 30 fps at ultra.
just recommend getting a fairly large screen, 27 inch min. i had a 25 inch 1440p and i didn't like it too much, went to 32.