Don't by the 80d, it's not a bad camera, but it's not what you want... And the magic lantern for 80d may be far away. My first camera was 1100d and now I have 80d and a 100d just for magic., I am not very familiar with making professional video, but for the money I spent on my 80d, I am not satisfied. If you can wait some more, good idea to save more money, and point to some better cameras .
Maybe it's a good idea to ask for video from cameras you are interested, in different situations , and after, on your computer to see how you work with, and how they look., For 80d I can send you some cuts.
If the photo is not the 1st option, I now you have some glass for Canon, why not to consider Sony a7 S I, or Mark II? By the way, I think the mirror less, are more capable in terms of video? They have more Ram memory? Meybe it's just a wrong opinion of mine.
Did you see the Zeek's videos about EOS M?
Don't rush, cheers!