A lot of people have complained that the C100 and C300 Cinema cameras from Canon don't have autofocus ability. Now that can be added when you send the camera back to the factory. They'll swap out the sensor and replace it with one that will work with autofocus lenses. That's a $500 upgrade, and it's also available on those models as they're sold today. But is autofocus really what you want? That all depends on you, and where you're shooting, but it will certainly improve your resale value.