Hi All,
If you are lucky enough to have these mega packages available it sure makes life easy. We use Mastercam for solids but I can highly recommend a cheap alternative for 2.5d milling (.dxf) and 3d milling using stereolithograpy files (.stl) from solids. Its only $200 and beats the pants of many more expensive options for ease of use. Check this guy at
http://www.deskam.com Also some resources for making your own CNC router. Use it free for 30 days!
Cheers
Andre