What iPhone I should get

The iPhone X still sells for more money than the iPhone 11, of what i have seen, atleast for new and sealed units.

The 11 has the same display as the Xr, with the same bezel, you can get used to that.

If you are in the US, you can also look at the Refurbished section of the Apple Online Store.

https://www.apple.com/shop/product/FQA52/Refurbished-iPhone-X-64GB-Space-Gray?fnode=296f16c4afb171743cba46a0600d82737f46eda08e4021a0d18a0e4870a438c932e3c6855908ed40f93515522abedf8aa4c4ec8488a1c158de4cab66daadeedaabfdd6a159f4a09a55f050bfe4f08353

Xr is 599$, 11 is 699$. Refurbished iPhone X starts at 679$.

That is up to you. The Xr has the faster processor, improved speakers, improved camera & camera features. But the X has the higher resolution OLED screen, and a dual camera.

Apple doesn't the sell the X anymore, you need to buy that one third-party. You can also consider the 11 which is the successor to the Xr.

You can compare all models here:

https://www.apple.com/iphone/compare/