There are some really great answers to you here and do take the time to read them all. To me the biggest factor here is for you to be honest with yourself about your degree of self-control and maturity. Too many street riders try to emulate stunt riders in the one mile wheelie, stoppies, rolling burnouts, eternal penis length contest etc. The performance of modern sportbikes is extreme to say the least. Another factor you did not mention is what do you want to do in your riding, how tall are you? Ride to school or travel around, take your girl friend out on a nice day? The CBR's and GSXR's are awesome track day bikes if you are not very tall or don't want to ride for a very long distance, also it would take a pretty tough girl to sit on the back of one for very long on bikes like these, (my wife calls it the gynecologist riding position) !
Another thing some people have touched upon, that is this cost to (fully)insure one of these bikes at your age, WOW! Save/borrow enough money to pay cash for a decent used bike, check e-bay. This way you are not paying obscene insurance rates for full coverage ins., just the legal min. of ins., (be sure to ask how much additional medical ins. would be though, don't ask why I say this!).
Check out supermotard style bikes, then you have limited off-road cap.
Check out Ducati's too. For example a good running Monster isn't that much and is a hoot to ride, handles and stops very well and with pipes sounds awesome, look at e-bay item #260547561858! Besides, when you roll into your favorite bike hangout on a Duck there won't be any other of them, unless you are at the Rockstore in Malibu, or the base of the Crest in La Canada/Flintridge CA.
In the end good luck kid and ride safe. Superior mental attitude always wins in the end.
Ricky Gadson, when he was a kid they called him 9 on a nine, nine years old on a 900 Kaw.