I purchased a copy of SheetCam when I started my KRMx02 Plasma CNC experiments. I can tell you for CNC plasma toolpaths, SheetCam is awesome and I would purchase it again.
I primarily use VCarve Pro to generate my CNC Router toolpaths. It has never failed me, but it is very pricey and might not fit into some budgets.
I just started playing with SheetCam for generating CNC router toolpaths. While there are tutorials available for CNC plasma using SheetCam, I could find nothing for CNC routers, so I thought I would document some of my settings and procedures so others can benefit.
In the process, I will be making this little gear. It is made out of 3/8" PVC.
You can click on any of the photos to enlarge.
VCarve has an ability that SheetCam does not. It has built-in CAD. It has the ability to modify the shapes in your imported drawing. It also has the ability to add basic shapes and fonts. It lacks the more advance features of a dedicated CAD programs like Coreldraw, but it sure is nice to be able to tweak things in CAM if needed.