It is relevant if you want to use VSync, then you’re locked with your maximum refresh rate. VSync is used to avoid vertical tearing of your image, but it has it’s downsides which currently can only be countered by adaptive VSync (not that great) or GSync (much better, but requires specific monitors).
If you say the above mentioned Acer is too expensive, what is your price target? Because usually, good representation of colors as well as good calibration AND great response times for games are things that don’t match up very well with flatscreens. Not even if you spent a lot of money. The Acer actually is good in both territories. And also it’s a GSync monitor, which might become in handy.