I want to have both at the same time so I can really see which one I want to keep for the long haul, which I plan on doing. I *know* the AF100, and after tuning it for a few weeks when I got it, it does shoot beautifully.
Great. Let us know what you find. I was interested in the FS100 at first, but as it stands, I am likely to stay with the AF100. There are surely some differences with the sensor and other features, like the presence or lack of ND filters. However, they both seem to be very similar in what they produce, especially once you consider tweaking the camera and quality post-production. I would like to hear if there is a huge difference with the FS100, but I am likely to stay with the AF100 until the next cycle of cameras. They are both going for something too similar for it to be worth switching for me. I am more interested in what comes out 2-3 years from now.
I am not trying to start an AF100 vs FS100 debate. Both seem like great options with some compromises. It is just that both are indie level large chip cameras with some different strengths and weaknesses, none of which I consider strong enough to switch to the other right now.