Have an MX5200 and a light weight reverse tine LandPride tiller. IF you have rock, either get a forward rotation OR get something that is more heavy-duty than you think you'll need. You end up windrowing rock and pulling it into huge piles between the tractor and tiller. If I had known this ahead of time I would have made a different choice. Second tillage or just breaking up already broken ground is easier, but I have so much rock I have to rake it out and pile it up off the field.
Because I didn't get a heavy duty tiller, I ended up having to get a field cultivator to pull up as much rock to the surface as possible, and landscape rake to clear it out, grapple/rock bucket to sort out my piles and carry it all off the field. I'd rather the forward tiller jump over a rock and keep going.