I have a D90. It is not usable as a motion picture camera at all. You need to evaluate if you're buying a motion camera, or a still camera. The D90 is a fantastic still camera...but if you're just getting into photo and don't have an investment in lenses...get the 5D.
http://www.youtube.com/blhack#p/a/u/0/aWfbEfa5Jpk
I have a D90. It is not usable as a motion picture camera at all. You need to evaluate if you're buying a motion camera, or a still camera. The D90 is a fantastic still camera...but if you're just getting into photo and don't have an investment in lenses...get the 5D.