I'm wondering whether to get two 12" Infinity Reference 1230 subs or 1 12" Rockford Fosgate P3 12" (4ohm dvc). I have a mono amp that puts out 550w rms at 2 ohms. I could run the fosgate alone at 2 ohms in a ported box and pump 550watts into it or I could run both the Infinitys in a sealed box and pump 275 watts into each of them. Which do you think would be louder and better sound?