What should I buy?

[Javi7707]

First my English is not very good.
The problem is that I have a Gtx 1070 and I want to buy a new screen for it, I'm currently using a 1400x900 screen but I would like to buy a new screen to play games like lol in a better resolution and quality, what should I buy? I want to use the old screen at the same time while gaming, so what type of screen should I get? Thanks for your help.

 

[elbert]

The 1070 should be matched with a 75hz 1440p or a 144hz 1080p. LOL isnt a first person shooter so 1440p probably would be the best.
PCPartPicker part list / Price breakdown by merchant

Monitor: Asus - PB277Q 27.0" 2560x1440 75Hz Monitor ($329.99 @ Newegg)
Total: $329.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-07-26 20:00 EDT-0400