240HZ+ First Person Shooter Games Mainly! - This will be used as a main monitor, Not a secondary
$250.00 - $500.00 Price range, (This is not really all that firm just a decent budget imo.)

Let me know what you can come up with; Don't just post links, let me know why you think this is the best choice,
Please and ty!

Depending on how competitive you are this is a good starter to see if you like OLED panels. It's above 1080p resolution but 360Hz refresh, so not sure if it is a dealbreaker for your FPS games. Linus has a review for it but he said it makes seeing and tracking super easy

OLED vs LCD panels is night and day in terms of quality. You may need to get a WOLED depending on your lighting situation though. Kind of hard to "sell it" without you seeing it in person, so if you have a Microcenter or a Best Buy with some of these on display I definitely recommend going in to check it out youself

https://www.dell.com/en-us/shop/alienware-27-360hz-qd-oled-gaming-monitor-aw2725df/apd/210-bljd/monitors-monitor-accessories