There is a massive difference (test out counter strike on 60hz vs 120hz and you will see xD), but even should they not have the need of 120-144hz now, getting a monitor with that support for the future is the best choice they could make, unless they can score a 60hz for obscenely low costs.
The Acer Gaming Curved ED273 Abidpx is a very reputable monitor, and from a reputable monitor seller. If they have 1080p gaming in mind–not sure about specs–than it fits the bill great. There are other great options too, such as the MSI Optix MAG24C 24 or AOC C24G1 24".
There are low cost 60hz ones too, like Samsung LC27F398FWNXZA, but again I personally would not recommend buying a new monitor in this day and age, and purposely getting low hz.
I went from 60hz, 75 to 100hz and saw massive differences in each. When I got my 144hz monitor, it was insane. I did a side-by-side comparison in Squad and Counter-Strike, and it was like I was a snail responding to things on the lower hz.
If the goal is to just play RPGs and whatnot, obviously you don’t need to get 120+ hz monitors (it is a nice feature to have for all) but it could be overlooked for other things, like color accuracy, gamma, monitor features, price, build etc etc.
That’s true. If I knew more about budget, system specs, location, store preferences etc, I could provide some suggestions.