I actually only play JRPGs like currently Lost Odyssey, which comes with unstable <30fps. The last time I tried a modern game was BF2042 and that wasn't worth my time or any attention in regards of spending money for hardware. The Ultrasharps are all over 1000€, right? I think you are right with the color and maybe I can…
Any cheap $300 IPS sRGB monitor like 98 % of sRGB + colorimeter are perfectly fine for anything . Much better than expensive one without colorimeter. I always suggest to spend money to something like x-right colormunkey or spider rather than expensive monitor. And it's often cheaper in sum. If your don't setup ACES…