"Why saddle your system with a disadvantage when you have spent all your hard earned cash on getting it to be as fast and responsive as possible don't you think Dude!!!!! "
Err, maybe I do think, but someone here does not.
60 Hz is fine for gaming, very few rigs hold 60 Hz even at 1080P.
Buying a monitor and selling it then buying new is your plan? How about you get the 4K and use its full potential for all but games. Surfing the net, writing letters, all your mundane tasks are much clearer, then drop to 1080P for gaming until you can upgrade your card(s). The 60 Hz 4K monitor is not all that much more than a good 1440. Its not like you are stuck with 4K, unless you don't know how to set resolutions in games.
Other than initial price the 4K monitor has no disadvantages and when I bought my Asus 28" on sale at Fry's it was only $50 more than a comparable 1440 27"