Every Nikon that has been made with video since the D90 blows the D90 video out of the water. They now all shoot at 1080 instead of 720 (still has that option though). I have filmed with a D90 and you get a lot of background noise, which can be very annoying.
The biggest argument I see between Nikon video DSLRS and Canons is that Nikons do 30fps, 25 fps, and 24 fps, while most of the Canons can do the 60fps at 720p which results in the buttery slowmo and clear image quality, etc.
So basically like they said: Nikon = photo, Canon = video. The nice part about Canon DSLR's is that all of them shoot the same exact kind of video, its the sensors and body construction, and photo quality you are paying more for. Nikon seems to stagger their prices a little more.