Question Lowest budget-price for casual gaming monitor?

Dave_2

Honorable
Aug 26, 2015
54
1
10,535
Was wondering how low I could go before its just not really worth it. Like reeeal cheap.
Specs:
ROG GTX 1070 8gb, 2x8GB DDR3 1600, i5-4590 @ 3.30Ghz

My monitor: HP Pavilion 20xi

I'm imagining it wont be too hard to find an improvement from this monitor but man I am so lost when it comes to understanding whether a monitor has good value or not, which embarrasses me a lil because I mean to also use it for Photoshop lol
Thank you in advance for any replies.