What about the nifty one that you have already?
Aren't you happy with that one?
You could always tell your parents that you really want to get one and that you're willing to earn it through doing chores or doing something that would really please them. Parents love it when their children show initiative and a desire to earn something rather than demand for it.
My dad always appreciated it, at least. There's a certain feeling of satisfaction in earning your way, much like I did when I saved up all summer to take that UW course in French my junior year of highschool.