Help choosing oled monitor

Hi folks, I'm luring on this sub for a while in search for an oled monitor. My current monitor is from 2018, it is an acer predator xb241yu, i belive is a shitty Vn or Ta panel so everything is grey and have por contrast. I've starting working at night shift so now on my gaming sections are gonna be morning/ early afternon. I don't like to play in absolute darkness, but i can dim my lights/ close my window e curtains in favour of Qd Oled.

I'm between getting the Alienware Aw2527df and the Asus xg27aqdmgr. The asus xg27acdng is hard to find where i live, both of them costs arround the same but dell have a 3 year warranty. i mostly play multi-player games like, deadlock, hunt showdown and ocasionally some single player stuff throwed into the mix.

Those monitors costs a fortune here, like 6 monthly paychecks so i need to choose what is the best avaliable here because i will be keeping the monitor for another 5 years minimum.

I've seen some videos of people using the Asus fps preset and they way it makes dark corners clear looks amazing, would i will be able to do the same on the alienware?

Some more info: I don't have a console, my setup is a 5800x3d and a 7900xtx red devil, sometimes i play 4k games on my tv that is also connected on the pc.

Thanks