None of these cards can consistently output 60 frames per second at 2560x1440:http://www.tomshardware.com/reviews/geforce-gtx-780-ti-review-benchmarks,3663-8.html
Look at the black bars in this benchmark. The R9 290X is at 47 FPS and the GTX 780 Ti is at 49 FPS.
If you want to target frame rates over 60 FPS, you will need to dramatically lower the detail settings or look at SLI.
The GTX 970 is on par with the R9 290 and the GTX 980 is on par with the GTX 780 Ti.
2-way SLI or crossfire adds 60 to 70% performance, so you might get 77 FPS from SLI GTX 970 cards or 84 FPS from SLI GTX 980 cards.