A couple updates and things in the works.
I met a local guy on team crossfire. He is running 4 crossfire xsv2 15s in a 4th order and 2 Xs 8k amps. He does a 159.9. I haven't got to hear his car yet because they just tore everything apart the other week and are redoing the box and adding 2 more 15s, another 8k, and 7 more batts.
I told him I'm thinking about running Fi BL 18s since they are in my price range (I told him I can spend $400 max per 18). He said he is going to talk to crossfire to see what they can do so I may be running crossfire subs if the price is right.
I'm talking to popwarhomie about running a self contained high voltage system (10g 31s wired in series for 120v) and using the Taramps high voltage line. I'm thinking 2 of the T-10k. I can wire 3 subs to each amp at 1.5ohm or .67ohm (the amp is stable to 0.5ohm). If I go the .67ohm route I'll probably do 16 batts and wire 2 banks of 8 batts in series for 96v to each amp. Since I will only be driving the truck to bass meets and shows to give out demos, I think I would rather not dump a bunch of money into alts and wire especially since I have to buy a camper shell now, more material for the box and bracing since I'm doing 18s, as well as a stripper pole.
Nothing is set in stone but this is where I'm at right now. I can always buy alts and rewire the batteries in parallel in the future if I'm unhappy with the results of the high voltage system.