Burnhard, a few condiserations:
Don't use Kicker subs in a JL enclosure. They are designed and tuned for a specific sub, it won't sound as good as it would in a properly made custom box.
Stock decks are never great. They will always be the single largest bottleneck in a system. If you want sound quality, change that before anything else.
I too love the Kicker remote bass knob. I have it mounted in my centre console, best purchase I ever made for my system.
Lastly, that's A LOT of power and subs for a truck interior. If you come close to even using half of the available current, you won't hear ANY vocals at all. Even with my Alpine Type-R front stage with lots of power, my bass knob never goes past the 50% mark, it's usually situated around 30%.
Just speaking from personal experience. Bass can be fun at first, but you'll get bored quickly. Sub(s) should be complementing to the sound, not the sound themselves.