I stumbled across this 3D modeling software on the web. I haven't tried it, but it looks pretty cool for $100.
http://nevercenter.com/index.php/Features%20Main/371
Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)