That is a big box, you could probably go to a kicker dealer and see if they have some of the pre-loaded boxes that they will let you try it out (if you have an amp).
With a hatchback, you are getting a pretty good bump so a 15" might not be necessary. If you have your heart set on a Kicker, I would recommend buying it from a factory authorized dealer (some will price match) so you can get the warranty.
Juan