Nice... a fellow tC owner who has interest in JL subs. 3 JL W3v3's would hit louder than the 1 W7 but the 1 W7 is far superior to the JL W3v3's in SQ no matter how many W3v3s you have.
I would say go with the 1 W7 but instead of sealed go ported. Either way, it will be loud and you will be satisfied.
Just a note that my opinions are just from word of mouth so take my advice for what its worth.
Also, you probably won't be left with any more storage space no matter what option you choose unless of course you go fiberglass. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
One more thing... JL audio is currently in the research/design stage of creating a stealth box equipped with a W1v2 or W3v3 or W6v2. Its a completely stealth install where one of the side panels will have to be cut in order to still give full storage space use in the hatch. Just giving you more options. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif