We reviewed the Sony NEX-VG30. The NEX-VG30 is a significant improvement over the NEX-VG10 that we tested previously. We did not test the VG20, but it's safe to say that the differences are smaller, with the main one being the new support for motorized zoom lenses.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips