so i am adding subs to my boat, i was thinking two boston acustics 10" and a hifonics brx1000.1d. now i am considering dayton reference ho 12" 2 ohm. one, maybe two depending upon how you guys think it would sound in a sealed box. If one will give me a reasonably pronounced sq sound. if i go with two im thinking about a cadence csa5000.1d it has 600 rms at 2 and 1200 at 1 so i would be able to put 600 to each if i decide to add a second later. am i thinking about this correctly?