With either version of MeshCAM, you an take the 3D file of your scans and generate toolpath to cut it out. However, neither will do the scan for you or generate a 3D surface from the point cloud data.
I generally recommend the David scanner if you want a minimum-cost scanner or the Nextengine scanner if you have a little more money to spend.
Let me know if I can answer anything else for you.
-Robert
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)