I say again that I don't understand why something like Marantz pdm 661 or Olympus Ls 100 ecc. with a video option hasn't been released yet, just adding a video section like a 250$ camera.
I wouldn't mind paying extra 200$ for such a piece of all-in-one gear.....This would mean decent video quality with no syncing needs in post, and audio flexibility ( internal or external mics and preamps ).
If somebody does this he will sell a bunch...!