A:
Yes I think the D3200 is an upgrade over the D80. My aunt has the D80 and I have the D3200. Here are some specs in comparison:
D3200: 24.2mp, 4fps, DX-CMOS Sensor, 11 point AF, ISO 100-6400(12800), 921,000 dot display.
D80: 10.2mp, 3fps, DX-CCD Sensor, 11 point AF, ISO 100-1600(3200), 230,000 dot display.
So as far as specs go, the D3200 really wins over the D80. And the D3200 can record HD Video, but the D80 cannot. I would highly recommend the D3200 to you as an upgrade over your D80.