You have one of the better posts I've found when researching this, so thanks for all the info. Per chance do you have an example of what a GoPro video looks like?
My preference was to buy an iPad mini and use that to record, but the current version Mini 4 doesn't do 1080 at 60 fps. The Mini 4 design is pretty old and some websites indicate Apple is going to put out a version 5 in the fall, but I can't wait that long. I see that GoPro is offering a $100 camera trade in if you buy the Hero Black 7 so I'm leaning in that direction for now.