There's that option too!You may want to look at the factory sub options for your model year. I just recently install a 03' SVT sub into my 01' hatch. I now have my hatch/trunk space back. Now that I have that there, next step is to upgrade the subwoofer in the factory box with something a lil' better.
Holy doodoo batman! I like it!!!!something else to think about
i have used similar and you do get more bass from these than you would any underseat sub