Running @ 2ohms mono isnt too shabby in itself( My CRV gets down pretty good @2 ohms mono)..Get a great amp with some head room @ 1 ohm,and a single 15 - DVC4 ohm run @ 2 ohm for the time being,and grabb up another sub and build a dual ported chamber...Subs up ,port rear in that SUV, and she can sound fantastic @ 1 ohm load. for a pair, you may even try 4-12s,or squeeze 4-15s in there or an 18,or a pair walled,8-10s even??You have some room to play with as well as to fill.Need get your electrical done right.Never rush into a complete system install,take your time and BUILD it the WAY YOU WANT,and enjoy it research , go to some shows and look at and listen to several different systems ..You can always add to it as time goes on,and buying good quality gear that last, makes it worth while for your money spent.