New do?

I'm been toying with getting a new haircut. And by haircut I mean chopping it all off!

My hair is the dark color of the first girl above, and I'm crazy loving the punk style of the platinum chick below....

My current look:

It would be a big change, so I've been mulling it over for awhile since I am not at all impulsive, (thanks Dad) and the itch is still there . . . so what do you think, should I go for it?