flip up the single seat in the back and put a 15 there you will have plentyyy bass that what i did.. kicker l7 with 1600 watt brutis amp gets pretty loud ;

 

10's are not deeper they are punchier and 12's are deep but 15's are deeper and hit lower than anyting because of reponse ive been doing car audio for 10 or better yrs and never have i been told 10's hit harder .... i got tens and am wondering what im gonnsa do to get some deeper tones im guessing custom all the way.... its just gonna haveta be done....

 

Yea, I would think about replacing the middle seat with a custom box that you could get a large 13-15 in with a lot of airspace....

JL made one i think

I cant do it because that is where my truckputer lives, but keep us posted on what you decide.