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The most popular video cameras for motor sports seem to be the
ContourHD($300) and the
GoPro($200) cameras. Both are small, have good FOV, and decent (or excellent for the contourHD) resolution.
In my opinion, I use my HDDs more than my DVD drive. I would suggest upgrading the drives in the Mini and getting an external DVD drive. That way, when you need it, you can plug it in and go. Of course, this is only a more favorable alternative if you hardly use your optical drive.