why so much JL gear ?
and with only 3000watts all up on subs i dont think your going to get 9 15's maybe not even 6
if it was me i would just go for 3 15's or 3 18's rated for 1000rms or close to it so they are getting at least what they need to sound how they are meant to.
Brands to look into would be, Sundown Audio, DC, FI, Incriminator Audio, Ascendant Audio, SSA, thats all off the top of my head
i hope most of this made sense im just about falling sleep right now