Virtual Reality 360 Cameras

One main goal in new four high school Virtual reality headsets and learning project 2015 - 2017 is to produce 360 videos by students and teachers to Samsung Gear VR or Google Cardboard. We start with Ricoh Theta but there are many virtual reality cameras coming to the market. We also follow development of these products. Do you know any other good 360 cameras we could use in this project?