Testing of D7100, D5200 and D3200
As mentioned earlier take a chill pill. And take more photos and read less reviews. You have pro-level cameras (when compared to what was available just 5 years ago). If you like the images that you are producing then there is nothing to worry about. If you don't, first check to make sure your technique is up to snuff, and if it is go buy something else you really think is better (and of course tested, you wouldn't want to have any further doubts).
I love reading these tests and they can help guide me to 'value' lenses. I waited for months to see the D600 lens reviews and the results were no surprise. You can see it in the images if you have been shooting for a few years and still have your older lenses and camera bodies for comparison.