sub woofer set up

what sub should i buy to make the most of my 1000watt rms amp..... i was thinking a dc lvl 4 in a bigger ported box.... and what type of bigger box should i have

Current set up is two 12's in a Fox Acoustic Box in an 03 dodge ram under the rear seat. Thinking of making a console box with one 12 with double the air space 1.5 at least. Would it be possible to keep the two under the seat and the new console sub or should I remove the rear seat sub's...