I have just given my son my 3100 and bought a 5100. my opinion is that once you have learned to use the 3100, the 5100 is the next step up and after my first day, I am happy with my choice.
Hi everyone, I use a Nikon 3100 and always carry a subsidiary compact in my pocket for the pop up moments that catch you of guard when you aren't hunting. Great to be on board and keen to learn something.