I would try logitech for a good cam.
you didnt search enough. I remember posting how I "tested" over a year ago in the forums how to make a security cam with epia 10000.
Yes, epia 10000 has enough cpu to capture when I tested it with only one usb cam recording 22fps to a uncompressed avi file. It also recorded 12-15 fps to a divx file.
The problem I had is battery life. At the time of my testing, I only had a stock battery. I have not done anything with it since. Been busy.