"In my view, the FZ200's in-camera slow motion is a better solution than interpolating 1080/60p. It gives you smoother slow motion and reduces motion blur."
I think you are right. But, the OP said he wanted to shoot the Baja 1000. It is a race in the desert where the racers kick up a dust, sand and grit storm that is second to none. If he wants to get even a little close to the action he may need a dustproof camera. He may also want to wash it to get the dust off.
The other Bill