Coming from the SE I would find a new X. The X is a fine device. Will be supported for a long time.
Idk if you’re big on selfies or not, but I know the XS and Max have issues with “beautifying” your skin. That’s something the X does not do (thank god).
The X and XS are so similar it’s not even funny. It is by far the smallest “S” upgrade we have EVER seen. If you can find an X new for $799 or $899 I would jump on it