Yes, very good choice. The GTX 1080 will do 1440p gaming perfectly, and the G1 gaming is a good cooler design overall. An EGA FTW is a good alternative in case you don't like some aspect of the GPU. Plus, EVGA has awesome customer support as well. Which brand you choose really depends on your personal preference, the performance difference between different models of the same GPU core is quite minimal.
Also, get the Ryzen 5 1600, the value of Ryzen is just unbeatable right now. i5 7600K won't last as long as the 1600 would. If you're gaming at 60-120 FPS, the 7600K doesn't make much sense.