I haven't used mint4win for quite a while, but I usually recommend using a virtual machine for testing. You have save states and other nice features without the need to reboot. You can also delete distros if you don't like them and install as many as you like.
For actually using the system, dual booting is much better than mint4win, wubi, or a virtual machine. It's also more difficult than the other options, but it's significantly faster.
Running on a 4-slot toaster @ 60Hz