Part 1: Opinions on JL Audio Subwoofers vs. Rockford Fosgate's. I listen to mostly hip-hop if that makes a difference in the recommendation.
Part 2: JL Audio 10W6 vs. JL Audio 12W6? About $50 difference. Does it matter?
Part 3: Is the XD 700/5 with 400 Watts to the JL12W6 enough if I choose...