It doesnt matter what year the car is.
The problem if you got a 15 is that the only thing it would really be good for is hard hitting bass.so songs with fast bass the 15 wont hit in time like the 2 12s would.
the 2 12 would be smarter cause 12s can do just about any kind of music where as a 15 would be best for rap and thats about it.