'sup, good Cory
I don't know enough about the camera choices specifically (though I'm sure others do)... though I would say that having good sound is half the movie. Good images with crappy sound is just plain miserable
Spoiler: Sadly, I speak from experience there.
On the other hand... having a manual focus-ring is pretty good, too.
If it were to come down to a choice, though, of manual-focus vs. money for a good mic... mic wins.
What the heck is OIS, btw?