It's too soon for me to have much of an opinion on the D3200, but I really like what I've seen so far. I've taken a few pictures at ISO 1600 and 3200, and was surprised by the lack of noise. It's a really small camera, about the same width and height as my PowerShot G1 X, although it extends farther forward with even the smallest lens I have.
After I've had a chance to give it a real workout while doing my book, it will either end up as a backup camera or, possibly, be converted to IR if LifePixel finds it suitable for such. I've found that even more recent cameras with sensors that aren't so sensitive to IR can make decent IR tools. The D3200 won't end up as a hand-me-down, as my wife and daughter refuse to use anything that doesn't bracket and are happy with their D5100 and D5000s.
As for the NEX-7, I, too, found it very complicated to use initially, because its controls are so much unlike what we're used to with typical dSLRs. (But then, so are the V1 and J1's controls.) I probably spent a day or more wrestling with the use of the Navigation button, left/right control dials, and control wheel until I figured out exactly how to use them -- and I was already basically familiar with the NEX line, having owned an NEX-5 and NEX5N previously.
Once I had logged a lot of time and shot a lot of pictures, I found the NEX-7 much easier to use. It's a camera that grows on you. Its high ISO performance is not as good as the D3200's, but I am fortunate enough to be able to choose the best tool for the job, and when I need to shoot at lofty ISOs, I can just use something else.
The NEX-7 is versatile enough that I can work with it for quite a few different types of subjects, and I've got a ton of lenses for it -- including the 16mm f/2.8, wide angle and fisheye adapters, a 35mm f/1.7 C-mount lens, all my Sony/Minolta A-Mount lenses (with the adapter), and even Nikon lenses in manual mode.
Other people have commented about my stature, but at 6'2" I carry it well, and am trying to lose weight.