GTX1060 for 1440p? It can do that but you will live with around medium settings on games like Witcher 3 if you want to have the game running at least 60fps.
Just do not forget, you can also play 1080p on 1440p monitor, if you need the fps boost. It does not look as blurry as some people say or as you think.
-important-
Do not go cheap on monitor, people tend to keep the monitor a lot longer than the GPU or even the PC.
If you can afford it go for 144Hz 1440p IPS monitor, with or without GSync.