I would stick to the SD Panasonic cameras and not use the Canon 7D. The 7D will produce much better quality (I have an HVX200, 7D and a 5D Mk 2), but won’t not match the quality (or lack thereof) coming from video cameras. Conversion from the 7D QT H264 to Apple Pro Res isn’t very fast even on a 8 core machine.
Good luck with your project.