215/40/17 wont match up with your current tire size. the 205's are actually the closets to stock tire diameter, but its not exact. If you get the 215's, your speedo will read wrong, probably only by like 2-3 mph, but if I recall, the 205's are only off like 0.6 mph as compared to stock. Definently get 205's...And about the tires, I agree with both of Booty's opinions on tires, but it all depends what kind of climate you are in.