The new nikon was to expensive and I have not really seen any footage out of it except the amazing low light stuff. The D90 has no manual controls for video. The Canon 5D was a little outta my price range for something I don't know will work for what I need it to do. Also heard from a bunch of people saying the GH1 was a better "VIDEO" camera than the 5D. I was up in the air between the Canon 7D and the Panasonic for awhile. They both have their goods and bads about them. This little Canon vs Panasonic review is what pretty much sold it for me. http://www.dvxuser.com/V6/showthread.php?t=187165
If you look at the cards, the Canon has some strange color moire. They are Black and White cards but the canon mushes them into greens and Purples. Where does that even come from? Plus the Panasonic has better audio and more Lens options via adapters.
Although I have seen some amazing footage come out of the Canon 5D and 7D from Justin and Chase and some not so amazing footage from some others. That just goes too show that it doesn't matter if you have the best camera in the world, it's not going to hide the fact that you don't know what you're doing with it.
Checkout this amazing video by Chase shot with the Canon 5D http://vimeo.com/6692499
Thanks for the comment