Looking for a backup body to compliment the 5dmkiii for mostly wedding videography I currently own a 5dmkiii and 5dmkii but rarely use the mkii, only in emergencies or when im too lazy to swap lenses.  

I do wedding photography and videography, so it would be nice to have a cinema body that I can use primarily for videography and also be a backup to the mkiii for photography.  Any suggestions?