This is some test footage from Day 1 with the DJI Phantom 2, H3-3D Gimbal, and Gopro 4 Black.
Footage was edited directly in Premiere CS6, Graded, and has lens barrel corrections applied in order to fight the warping from the Wide FOV option on the GoPro. Unfortunately that is the only option with 4K.
GoPro Settings
4K/30P
Wide FOV
Pro Tune
Flat Color
400 ISO
-.5EV