The Phone in your Pocket $
You've already got it, so why not use it?
Nikon d7100 $$
With a 18-105mm lens (wide and zoom), this is an excellent way to get great-looking video and still images. Includes mic inputs. You can also experiment with other lenses.
Canon C200 $$$
Big bucks, but includes dedicated audio inputs, long battery life, large monitor, and most importantly—amazing video quality. You'll need to buy a Canon lens for this one.