I think you answered the question when you said you would hand-hold the SG. My initial response was going to depend on your subject matter. For general shooting, the RZ is faster handling and easier to load. If you were going to shoot a lot of Manhattan architecture, the view camera and tripod would allow you to keep verticals vertical. But you eliminated the tripod, so the SG is not going to be used as a true view camera for perspective purposes. So we end up with the RZ.