Help Decide first camera

I am wanting to buy a video camera but need suggestions on which one. I would like the pan and zoom but can it pick up motion and do alerts? Anyone have a pic that can show me the range of view for the below?


The imager and field of view for all three of those models is identical at 77° (horizontal) 54° (vertical)

The 620PT has the same motion detection capabilities as the other two. It has Pan/Tilt features but not an optical zoom.