Well, I have bought Vectric's Cut2D and find it the easiest to work while allowing the most flexibility. Of the other two, one was in still in beta (after a very long time) and the other was not intuitive in its learning and not as flexible as Vectric's.
One of the best features is that I can fiddle with something in CorelDraw, export it as an EPS file and import it straight away as a vector sketch in Cut2D. After a selection of size, cutting tool setup and profile machining, the output is Mach3 ready; very snappy!
I think I have found a good match between software, machine and bankbook.
Peter