Who said ANYTHING about components. I'm talking 112db effeicent horns with 100 effecient midranges (8's) and midbasses with 500 watts a peice on them, 3-way ACTIVE fronstage, lotsa power. That's quite bit different. MUCH better drivers than eminence, properly installed, all on axis, little to no cancellation. Comparing that to cheap drivers many of which are off axis, in improper airspaces, etc, and yeah, I can get darn near or as loud with less. I'd put 100 bucks a system as described above would be within 3db's of yours 2k-20k. Not all high effeciency drivers sound like crap, eminence does though...........
Honestly, most people think AB's in ported boxes with stock speakers sounds "awesome". Try playing something other than rap or poorly recorded music. I doubt you've got a stage out on the hood with width to your pillars, I'd bet you have no sounstage at all. Frankly, you can't avoid cancellation with that many drivers, so I wont' even discuss tonality.