What sort of games do you play?
The 1070 will run 1440. You may not be able to max out every game, but it will run.
If you're more into competitive fps and absolutely need the most fps, get the 1080. If you're fine with a little less fps and like more eye candy go 1440. I really like my 1440, and that's what I'd recommend. But I dont do anything competitive and would rather enjoy a better looking game.
The 1070 will run 1440. You may not be able to max out every game, but it will run.
If you're more into competitive fps and absolutely need the most fps, get the 1080. If you're fine with a little less fps and like more eye candy go 1440. I really like my 1440, and that's what I'd recommend. But I dont do anything competitive and would rather enjoy a better looking game.