I have the VT30 and love it. Still waiting to get a calibration. TBH, the biggest issue is that my room doesn't have window coverings because I mostly watch this set at night. I don't think calibrators want to start work at 10 PM...
I chose the VT over the GT because I wanted the Black Pro 2. Is it necessarily better vs the GT? I probably wouldn't be able to tell.
I have yet to watch a 3D movie, though I did buy an extra set of 3rd party glasses. 3D makes me dizzy and I still prefer 2D done well.
I went with 65vt 30 because I preferred the one sheet of glass design, wanted the best light filter for daytime viewing, 96hz playback, and wanted the best blacks possible.
I wouldn't have bought it at release though with its $4000 price tag. I got my 65vt30 for about $2400
