Which monitors should i buy?

Only 400hz BenQ Zowie xl2566x+ or 240hz BenQ Zowie xl2546 with 180hz 2k IPS monitor? 240hz Zowie and 2k monitor that i want have the same price combined as the 400hz one where i live
note: i mostly play fps games but also some adventure type ones

why do you need 2 monitors
and also why do you need 400 hz

buy 400hz only if your pc is really good, i have benq xl2546 240hz and my pc is a bit old now, but its enough to get some good fps, so im more than happy with it. thats just my opinion tho

400hz waste of money just get the combo of 240 and 180 and use the 2k one for adventure games 240 for fps

240-360hz oled
0.01 response time means you'll see less ghosting on higher hz and looks nicer. enemy outlines pop hard.