I'm gonna buy this for christmas. it's rated better than the benQ BENQ XL2420T and it's cheaper, it's 120hz,looks awesome.
And 1MS responsive!!! ( you said you played FPS,it's the best for you because of that)
Ecran informatique Iiyama G2773HS-GB1 LED - G2773HS-GB1 (3602656)
343 euros, idk in dollars,but i think it's below 400 USD.
honestly, for performance it's the best you can have, maybe not for image quality and colors,there will be 600$ panels better..
Sorry if that's not what you are looking for, i'm really bad for monitors, i just know the basics like 120hz and response time but i don't know exactly what is IPS, all i know is that it's LED backplate.