1. Do you have an AMD or Nividia graphics card?
2. Do you value colours or speed?
I'd recommend this one then:
https://www.amazon.com/Acer-XF270H-...words=144hz+1ms+monitor&qid=1592399816&sr=8-4
It's on sale for $60 off, making it $240. It's 144hz and 1ms response time. It's also 27in. The panel is TN, which isn't the best, but if you care about gaming it wont really make a difference. Additionally, it's G-Sync compatible. That means that even though you do not have an AMD graphics card, it will take advantage of Free Sync
Monitor prices are a little inflated, because of corona-virus. basically just check color accuracy, and panel technology and see if it has g-sync (Nvida GPUs) or freesync {AMD GPUs) basically that prevents screen tearing g sync is a little more expensive though because it takes a onboard cpu.
I was looking at that yesterday and it said it wouldn't be in stock till july like 20th. But I checked today and it's in stock now! I got the monitor with a display port and dual monitor arm. Thanks!