If you want SPL without sacrificing SQ, you could always go with the new D9's from Diamond...from reviews ive seen, they hit almost as hard as the Kicker Solo x's, but with much much better SQ...You might could check out the SpV.2's elemental design's is doing limited prodution at $250 a piece...but i dont think they have quite the SPL of the Solo X's or D9's, still good SQ...