Ok, at least that gives me something to work with.
JL Audio is nice gear, but it has a very specific sound. You either like it or you don't.
Have any of you guys even consider going 8" or 10" subs?
If 10" is what you are after or would just like to over the moon with single sub application, get A Image Dynamics IDMax10V3. Run single and ported enclosure, moved my brother from 2x12 to single one of these. He can't believe how much better the sub sound and way louder too.
These subs really can play any music, plus are SQL (sound Quality, Sound pressure level).
Otherwise if you want retain as much space as possible, go to either 2x JBLGTO804 or new Alpine Type R 8" x3 in 1.5ft3 ported tuned to 32hz.
As for speakers, Hertz HSK163.4, not entirely a drop in solution but you need to make a spacer for the midbass.
If you want a drop in solution that still performs exceptionally well. Rainbow IQ325.20. From memory that is the replacement kit. That is a true drop in solution.
Otherwise depending on your budget, go for DLS or Focal. To name a few.
This at least gets you started into think what is available.