7k? Wow... what was the labor cost? That shit is easy to do, you might have been able to save a SHIT load of coin, and learn something in the process by shopping around/doing it yourself. Its not as hard as everyone seems to think... Extremely nice setup though.
Good choice in going with the capacitors as well... Your headlights would probably pretty much turn off at every wattage spike in your music. They would dim with the beat. haha.
That is one awesome setup you have. I am an installer at a shop that sells mostly JL Audio. The setup looks great, and I am sure it sounds amazing. :rockon: