Thieves love to kick in subwoofers they cant get out of the box. Maybe consider a downfiring box.
The more intricate your install, the longer it takes a thief to get at, and/or remove a piece, the better. So if security is your goal, again beyond the obvious prevention, you could do a downfiring box with a mouting setup that requires removal of the interior to get at the woofers. The amps wouldn't be as easy, as you would want access to them at least until you set the gains/filters/etc. Then they could b built into the interior and/or box.
I still say get a rusty Ford Tempo and bump funky pups tho. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif