Just a suggestion: start with VMWare Server (but only version 1.0.9 or before). I have used all of VMWare's products (yes, even ESX and VirtualCenter), as well as VirtualBox and Virtual PC. VMWare is easily the best. If you get VMWare Server before version 2.0, it looks exactly like VMWare workstation. If you work with it for a while and find you like it, you can easily upgrade to the more difficult 2.0 or above, or you can purchase VMWare Workstation. When they say that you can't run Mac OS X in any virtualization software, they are pretty much right. Running OS X in VMWare can be done (I've got an 10.5 vm), but it is really difficult and you have to do some pretty severe modifications to the OS. Mac OSes expect to find an EFI environment, but any PC or virtual PC will present a BIOS environment, because that is something that IBM-compatible PCs expect. It is a technicial problem, not anti-pirating by Apple.