I was looking at the Alpine psu-300acd subwoofer and amp. I like the idea of being hidden away, and somewhat “plug and play”, but $800 seems steep for a mediocre sub. I don’t know a whole lot about subs, but I can get a shallow mount L7 kicker 10” solobaric in a slim box for 300. And an amp for maybe $200. I want to keep as much trunk space as possible. What would you recommend?