for the space that they take up (the square ones). Plus, they hit hard as hell. As far as the vehicle, I would go with Bravado. Take out the back seat, seal that puppy up, and you've got a nice chamber to put up some serious SPL numbers! Not to mention more room for more speakers!! I think I'm going to go with the 10" Kicker Solo-Baric when I outfit my Z with a system!