- Like what you've got: if the camera has four digits in its name and the second one is 1 or 2 or 3, stick with it; everyone else should know that the current D3300 and D5500 really are rather large steps forward from what they've got. Choose the D3300 on price, D5500 for the swivel LCD. Indeed, choose the D3200 or D5300 (still available new as I write this) on price if you’re really trying to get the most bang for the buck.
- Dislike what you've got: You have three basic choices: (1) stay with the same type of model and get the current version (D3300 or D5500); or (2) move down to a mirrorless camera (Nikon 1, m4/3, Sony Alpha, Fujifilm X, etc.); or (3) move up a model. The next model up is the D7200. You could also leave DX and move to FX, but that's a huge change.
Which should you do? Here's the simple guide:
- Choose #1 (buy a D3300 or D5500) if you're happy with what you've got in terms of camera but want to upgrade simply to update your equipment to the latest. Be prepared for some surprises if you're moving from 6mp to 24mp, though. Things have changed a lot since you bought your camera. Some of your lenses may need replacing (the 18-200mm is one such candidate).
- Choose #2 (buy a mirrorless camera) if you're looking to lighten up and not looking for a huge change in image quality. Be prepared for a possible downgrade in autofocus performance, though.
- Choose #3 (move up a model) if you've gotten more serious with photography and are starting to feel held back by the high prevalence of automation in your camera.