Going in a 2000 mustang with the rear seats removed, a picture of a basic setup of what I'm doing would look like this
http://www.mikefordmustang.com/writeups/how-to-make-a-rear-seat-delete-mustang/rear-seat-delete_files/23.jpg but I'm also planning on mounting the amp where the bottom of the seat would be and with some lettering and a mustang emblem done in the carpet. I listen to mainly rap (wiz khalifa, lil wayne) but with some older rock in there too (AC/DC, Ozzy and so on.) along with a little bit of alt (Cage the elephant) but the main music I would be using these to listen to would be on the rap end. I'm thinking about going ported because that seems the best for a "boomier" sound, but I may have to go enclosed with this setup as I'm mounting the subs through the delete kit into a box I'm getting custom done. Not much in terms of goals other than to be fairly loud but sound clean. I'll be getting mids and highs later on, not too far in the future but more after this semester is over.