i run two gtx 980 in SLi for 1080P...overkill for most but if you turn games all the way up and max filtering at 16x by 8x (super sampling when possible) with vsync @ 60hz...all of a sudden its not overkill. games like gta 5, crysis 3, metro 2033/last light redux, far cry 4, Titan Fall, and many others will use every bit of processing power you can through their way for those settings. So before you rule out a GTX 980ti, ask yourself how much filtering and whether or not your willing to dial back the graphics settings to achieve your desired FPS. If it were me I would keep the TI build.
otherwise a gtx 980 standard or gtx 970 (personally no i don't like the latter card and would have issues with the 3.5 and .5 GB of ram issues with all...