I have the D7000. Love it, but...(see later) My boss's husband has a D5200. What questions can I answer for you? Line up the specs on B&H so you can decide if there is a function you need/want?
My D7000 went back to Nikon to be fixed.
I "think" I am at 10666 shots. That number will pretty much double in the next six months. My only regret is that there wasn't a full framed (FX) camera with all these features when I got it. I would recommend the D800, BUT....It blows your budget out of the water.
How into photography are you? Will you wear out your camera before it gets old?