With that power youd probably want to do the lvl4 12 after rise and voltage drop itll be good and the lvl4 would love that power. Call tue shop i think theyre the only ones that can do custom color caps but i could be wrong.
Its not about it being an almighty dc woofer but i had my stock lvl4 18 off a crunh gp3k and it didnt blow and i would hammer that ish but i dont know what happened here so i cant get in it. Contact rusty and see what he says.