I run a dual boot as there are still a few things I require from windows but Linux out performs windows in almost every way.
It now has a wealth of software to back it up, which was once the major factor in putting potential users off.

Microsoft have to face up to the fact that their monopoly is beginning to fall apart and mainly through their own greed and arrogance.

A fact highlighted by the success of Firefox and other Mozilla applications.

You can get hold of a live CD to try it out if you don't want to jump in feet first just do a web search for Knoppix.