Originally Posted by
Artorius
High refresh rate panels are useful for playing shooters, yes. They're mostly TN panels and TN panels tend to be worse than IPS or VA panels when it comes to color reproduction.
For what you play, it's very subjective, 60hz should be enough but 120/144hz are obviously smoother.
For 24" I believe the U2412M or the PA248Q are good purchases.
I'm not familiar with prices there, someone else might be more useful with recommendations.
Since you're used to a FHD 14" Display which results in a higher PPI than the same resolution at a bigger display, the U2515H might also be an option, but keep in mind that this one has QHD resolution and that might be too much to handle at newer games (the ones you mentioned are probably all safe, not sure about FFIV though).