I am using this camera and very happy with it. I have kit 18-55 and Nikkor 35 1.8. And want to buy new lens which will be good for D3200`s 24MPs sensor (probably Sigma 17-50 F2.8 EX DC OS HSM). But with this camera tested not many lens and results does not make simple to predict how new lens will behave with it. For now tested:
Tamron AF 28-300mm F/3.5-6.3 XR Di VC LD Aspherical [IF] Macro Nikon
D5000 4P-Mpix this results looks ok
Tamron SP AF 70-200mm F/2.8 Di LD (IF) MACRO
D7000 9P-Mpix what? twice better sharpness?
Sigma 120-400mm F4.5-5.6 DG APO OS HSM Nikon
D5000 5P-Mpix also looks ok
So could you please test more lenses with D3200 which already has quite big audience. Especially I am will be very happy if you add tests with lenses which can replace kit lens.