I've been a mostly happy user of ZW3D CAD/CAM for a few years. I'm not saying that it's perfect but the blend of the CAD and CAM to me is a good thing. I helped a few friends who recently tried the 30 day evaluation version of ZW3D 2013. The post-processors that came with the trial are fully functional and identical to the ones if you purchased the CAM capabilities in ZW3D. Some generic post-processors are there but that doesn't mean they will work with whatever machines you have. Maybe or maybe not. One guy found one of the post-processors that worked almost perfectly with his Fadal. He primarily does fundamental 2 axis with some occasional 3 axis simultaneous. The other guy had Mori-Seiki's, had more complicated post-processing requirements (complex 3 axis simultaneous and some 3+2 rotational work), and we had to make modifications to the default post to make it work.
A few of the ZW3D US resellers have much experience in CAM.
Though I didn't need it I think they are capable of helping on post-processor issues.