Gaming monitor recommendations

Hi, any recommendations for a gaming monitor na below 3-4k? Planning to buy my second monitor (mountable) na would mainly focus sa gaming + ( would transition to wfh setup narin kase and company requires 2 monitor ). Currently have nvision hd900p.

Also, what are the things needed ba para magka second monitor? I was told na need ng graphics card, I already have one naman pero just wanted to make sure.

Is my budget feasible or do I need to increase it pa?

Thanks!