In reply to lone:
As Dan suggested mirrorless is the way to go. Same sized sensor as a DSLR but in a smaller package. You need to decide what you need, what's important and what isn't to decide on the brand and model that's best for you.
I have a Sony A6xxx which I like (great quality, small body, good controls and decent lens selection) but it might not suit you.
Lenses are just as, if not more important than the camera. In the end you'll get great results from any camera you buy, I here that the 12" behind the camera are actually the most important thing....