You see that photo up there? That was taken with the iPhone 6. It's just one of a number of images released by Apple today from iPhone users around the world. This gallery proves one thing.
THE BEST CAMERA IS THE ONE YOU HAVE WITH YOU.
Check out the rest of the gallery for yourself. If your work isn't up to this level even with thousands of dollars of bodies and lenses, think about spending your time and effort on improving your technique instead of just getting another piece of gear.
A good eye will beat a good camera 90% of the time. And even then, let's face it, after a few years of evolution, the iPhone has one hell of a camera.