What are the things to consider before getting an OLED monitor?

Hello everyone, I'm planning to get a 1440p 240z or 280hz OLED monitor.
What are the things that I should consider before getting one?
QD-OLED? WOLED?
And specs-wise, what should I look for?
Which brands has better "quality" or "protection?" (anti burn-in features and what not)
Information online are quite overwhelming.

Will be mainly used for competitive games (DOTA 2, PUBG, VALORANT, CS2)
Budget is around $405 - $460. I'm not from the US btw, don't let me hear micro center deals, I'm gonna cry.

PC specs:
Ryzen 7 9850x3D
32GB CL30 6000MHZ RAM
RTX 5070