My current setup is what im using in my sig.. The box sits right behind me on the backseat of my truck and i can no longer take not being able to recline my seat as far as i want. My question is do i put my current sub in a slanted sealed box or buy 2 10's or 2 12's that work well in a sealed enclosure and go that route? BTW im looking at older model alpine type r's, the ones like this.