Canon DSLR cameras has been a favorite for videographers wanting that full frame sensor for quite a while. Canon has failed to make any big improvements in video quality from the 5D2 to the 5D3 leaving the door wide open for competition. Some other makers have come close before. It appears that Sony thinks it has found the perfect recipe to finally make itself the camera of choice for that film maker in you.
Good prices on the Sony A7s here
Good prices on the Canon 5D Mark III here