Arsenals are SQL subs. I would personally take the arsenals anyday over the L7s because they will sound WAY better. (L7s will be louder but sound like crap doing it)
the Arsenal will not only sound better than the L7, but it will require less power to get loud. and less space for a box....cuz they are optimum for sealed.
well will a ported box be louder, or should i stick with sealed and what amp should i get for the 2 12", or is it worth the extra money to get the 15"s