I bought my fiance one. It's a 04 ninja 250. I have an 03 R6 and she gets jealous when we go to track days and she doesn't get to ride. So I bought her a 250. It's good to learn on for sure and great for a female (this is not sexist).
pwnag3!!, do you ride?? Any newB should NOT start off on a 600cc bike. I don't care who you are. 99.9% of people can NOT ride a 600 to it's full potential and that's why I don't know why people start out any higher. Motorcycles are something you have to get a feel for and if you've never ridden or you have little to no experience you are doing yourself a favor in the long run by getting a smaller bike. Less room for error. Even a 600 can get you in trouble REAL QUICK!!!