Dang, that audio was pretty noisy. Were you using the Rode Video Mic with a deadcat?
Looks good, though.
Paul listed the general DSLR shortcomings, but the Panasonic GH2 solves a lot of them. There's no limits on recording time (30 minutes on the Euro versions I think), better in camera audio (but still vastly inferior to a dedicated recording device), and slightly better rolling shutter issues. In addition, you can adapt pretty much every single lens ever made to it.
If you're just starting out, though, I wouldn't sweat it. The camera you've got is infinitely better than any camera you ain't got, so to speak. It's a fine camera to learn on and when you're ready to step up to a better camera there will be a whole new array to choose from.