Should i upgrade my gpu or go to water cooling?

Hi im really in to arma 3, and play it alot.Currently i want to improve my sight from 1000 m to 2000m.i like using the 75x scope and mill dot aiming it feels amazingly satisfying to kill that way. Any way to the point, i have a evga gtx 670 which has a problem with heat, i dont like going past 80 in heat and it has trouble going to 2000m on arma on a multiplayer game.

do you guys think i should upgrade my card, and to what card?(im not a fan boy so i dont care if its amd or niv)or should i upgrade to water cooling and create a loop and push the over clocking (it would be a plus if it would reduce idle nosie)i havent tried water cooling yet so any help would be appreciated.

 

thank you guys.

WIth the ammount you would spend on cooling you could be better off with a gtx 770 or r9 290.

For Arma you would want to have an nvidia card.