Steve- The Mac is great for 3D work. It runs MacOS and Windows, takes 2GB of RAM, has dual cores (my 2.17 is as fast as a dual 3.6GHz Xeon), the screen is quite good and the video is 128-256MB ATI x1600, very good in Max in DirectX mode or in Cinema4D. There are Universal Binary MacOSX versions of Cinema4D and Modo so you have your choice of OS if you use one of those, and Cinebench actually renders faster in OSX than Windows.