Have you tried the Olympus?
They did invent the format, so might be worth a shot.
Interesting rig that guy's wearing, if a touch over the top

It's the zoom that bugs me. I'm guessing there's something on that rig which emables the zoom to be turned in a more 'oiled' fashion than normal?
The other problem with using a DSLR for video (or any stills camera) is that they have rubbish microphones (worse than a normal video camera) so you have buy an external mic and plug it in, or record audio on a separate device and then sync the audio and video files later.
This is the thing that bugs the hell out of me about the 500D I have - it's been resolved on the 550D - stereo and external mics can be plugged in.
All of these things have to compromise somewhere - I don't think any one of them can do everything we're (cheekily) asking of them. What you have to decide is what do you want yours to do most of the time? Take trick shots? Point and shoot? Video?