Haha sales tax here is 9.25%, But I'm pretty sure the sales tax goes off of where you register your plates and stuff. But I could be wrong. I'm the opposite of you, moved here from Miami and can't wait to go back. But anyway, so you have not ordered a 15? Are you planning on just picking one up from the dealership?
That freaked me out when I heard it the first time! Thankfully it's capped to 7% over $1600. To make it even weirder I guess the cap would kick in at $300 if the dealership was in my county but not in my city, if that makes sense.