James, Have you spent time reading the many good posts in the Digital Video forum. If not, then I suggest that you should do so.
I wish you good luck with your video experiments, but I feel the necessity to offer a few words of WARNING:
Experimenting with DSLR video should be regarded as a highly addictive pursuit! A great many of us freely admit to suffering from NAS. That in itself can become pretty costly, but NAS becomes only a small part of the overall "problem" as you become hooked on video! Getting hooked is very easy after you see some good results early on - and then start thinking about improving the audio to match the visuals that you achieved. Then you wonder what it would take to improve the visuals..........
DSLR video can become VERY expensive (but great fun)!