Thanks rhino really appreciate your post.I'll buy a handycam or blackmagic, if really cannot, I will go for 5DmkIII for my video need. I don't like the handling of Panasonic (for own personal reason, and not to say GH3 is bad or what), so GH3 appears to be at my lowest wants.
But why do you want to use the 5DM3 for video as it is not optimised for video ? I heard from owners of 5DM3 that the focusing is slow for video and most of them said if you have canon lens, then get the 70D for video as the focusing for 70D will be faster than 5Dm3.
Thanks