- Like what you've got: stick with it. There's nothing particularly wrong with the D7200. The D7500 probably doesn't interest you.
- Dislike what you've got: You have three basic choices: (1) move up to the DX Pro body upgrade (e.g. D500); or (2) move up to FX; .
- Upgrade to mirrorless: Z50II.
Which should you do? Here's the simple guide:
- Choose #1 if you're happy with what you've got in terms of camera and with DX in general but want to upgrade simply to update your equipment and get better body quality and autofocus performance.
- Choose #2 (move up to FX, most likely the D610 or D750) if you're now serious enough that only the best possible image quality will do for your next camera. Be prepared to have to upgrade your lens set, too, though, especially at the wide angle end. Note, however, that the D610 and D750 are overdue for replacement in Nikon’s lineup.
- Choose mirrorless if you want to experience the benefits of mirrorless (smaller, lighter, better lenses, future, etc.).
