Haven't finished project yet, but I wasn't planning sub in system. Just 6x9's in rear, and the 5 1/2's in front, with amp on all. Will put my Infinity's in pair of 6x9 solo boxes until I finish larger, dual box. I'm also trying to figure out what best arrangement will be for possible amp mount. There's not enough room under seats, and the rear floor board is too easy to steal. I'm thinking about creating false side in the rear of hatch area, with vertical mounting bracket, or building up the rear hatch floor, possibly incorporating the spare well somehow. Have plan for plexiglass amp case, with built in fans, which won't be very expensive. Then it can be housed, covered, and appreciated when desirable. Not sure yet. You like the sound of the Infinity 6x9's?