programing software

I am in the process of shopping for software to run my CNC lathe and
would like to know what most prefer, anyone have any experince with
bob Cad, pro's or con's is there a better software i like designing
my parts in Rino 3d because it is very easy to use and not very
command intense then exporting or save the file/design as a DXF and
then importing it into a program with the post processor to run the
machine any input very much appreciated.

Brg's
Dennis