Both vmware and parallels allow you to turn your existing pc into a virtual machine. Vmware's program is called vmconverter, it's a free download. Parallels must have something similar. The migration assistants can be harder to use as they require the pc to allow the mac to access it. Also, making a copy of the pc first lets you redo the install process more easily if there is a problem or you get through it and realize you might prefer a different setup.
Both vmware and parallels have trial periods, I think 30 days, so you can try both. They each have their plusses and minuses. Either one will work fine.