Third option and probably best for you.
System improvements - Linux Mint 9
Windows Installer: After a brief disappearance in the previous release, "mint4win", the Windows installer based on Wubi is back in Linux Mint.
This installer allows you to install Linux Mint as a program on your Windows C:\ drive, without touching your partitions.
Allows Linux Mint to be removed using add/remove programs in Windows.
Running from the live cd is slow so doesn't give a true feel for how Linux Mint performs.
Linux Mint is a great disto and an excellent Windows replacement if you don't need to run Windows programs.