I was about to talk about the fantastic seats of the sport package, but then again I have second thoughts...
This is your first car, and you want to be safe with it, so I don't think you need the top speed to be even higher. On the other hand, if you get rid of leather, the sport package seats are a bargain.
Anyways, if your parents are paying for it, you shouldn't abuse their kindness and have every option, just go with what you think you really need... And enjoy the drive, because however you equip it, the car is an awesome machine!