Almost any modern 60hz monitors can be overclocked to 75hz without any risk or voiding warranty, you just need to create a custom resolution on your pc, OP can buy the LG 24MP88HM, OC to 75hz, no hardware required.
the article you gave mentions this-
"PS4 cannot maintain a constant 60fps in games, and will output at 60hz,,Thanks to PS4 and Xbox One, a monitor with 60Hz will be enough for console gaming because all console games are working at 60Hz refresh rate. If you want to buy a monitor for PS4 or Xbox One, you don’t need to go higher than 60Hz."
also the article has some issues, 1/5/10ms response times in monitor don't matter, its marketing, input lag is what matters, PS4 being a console has high input lag and overall it doesnt kind of warrant getting a benq zowie if you dont play Halo.
I am using a zowie XL2430t and coming from a samsung TN panel with 5ms response time, 75hz OC, I Found next to difference between 5 and 1ms response times while playing overwatch, both have almost the same amount of input lag.