[SOLVED] Which resolution?

My soon to be PC specs are:
Ryzen 7 3800X (or Ryzen 5 3600X)
RTX 2080
16GB of DDR4 3200MHz RAM (not sure if you need any other specs)

I can get a 1080P Monitor that's bigger or get a 1440P which is 27" I also wanna know if I got a 1440P monitor would I not be able to play in 1080P in games? because I heard you should only play in your native resolution but I'm curious if higher settings in games or higher res are more worth it
 
Solution
You can run games at 1080p maxed on the 1440p monitor. The RTX 2080 should easily run 1440p maxed tho.

If you want to run the games in 1080p, the 1080p monitor will look better.
I would pick the 1440p monitor as 27in is large enough for me and the 2080 should be able to run 1440p easily.
You can run games at 1080p maxed on the 1440p monitor. The RTX 2080 should easily run 1440p maxed tho.

If you want to run the games in 1080p, the 1080p monitor will look better.
I would pick the 1440p monitor as 27in is large enough for me and the 2080 should be able to run 1440p easily.
 
Solution
You can run games at 1080p maxed on the 1440p monitor. The RTX 2080 should easily run 1440p maxed tho.

If you want to run the games in 1080p, the 1080p monitor will look better.
I would pick the 1440p monitor as 27in is large enough for me and the 2080 should be able to run 1440p easily.
Okay if my FPS drops below 60 on the 1440P would I be able to lower it to 1080 and still have a good experience?