you're 17
you're male
and you drive a sports car. (yes, thats right, a sports car. you don't have to have a v8 to go fast)

insurance companies don't like you. they know that you are gonna cost them money. so they are going to get as much as possible out of you. if you are looking to pay as little as possible, shop around, find some whole in the wall company, and get the bare minimums. I would suggest that you take your driving (and luck) into account. If you get in a wreck, you'll wish you had that full coverage.