I wonder if you are trying many megapixel cameras? For motion cap you don't need much over 2MP. http://www.optitrack.com/products/flex-3/ finds models cheaper than the many thousand buck models we used in 2010.
I'm looking for a camcorder that has very little motion blur and I guess at least 60 fps. I'm setting up a motion capture rig and the cameras I am using now give off way to much blur and it is hard to track targets. That is my current issue. Something lightweight and small would be nice. I'll need 3 or 4 so something not to pricy would be preferred too and because I don't have a whole lot of room I'm dealing with, something with a decently wide angle yet not to much distortion would also be ideal. Thank you