This camera is a better deal at 6800 than the black magic at 3000. Black magic is 2.5k interpolated, this is 1080P but pulled off a 4k readout. Look at the charts on EOSHD, the black magic has moire issues in fine detail and is not any sharper than a C300.
C100: removable battery, buttons, viewfinder, neutral density, sensor four times as large, XLR inputs, autofocus, smooth iris control, platform neutral workflow, much better low light, double the rated battery life
No way you are getting a Black magic running for the list price, that camera is near unusable out of the box. The fact that you have to format the SSDs with a mac filesystem basically means it would be unusable in a PC workflow.
The c100 you could actually do regular commercial work, it's ready to go out of the box.
You could actually make a living doing low budget works with a camera like the C100. The black magic is a movie camera and not much else.