JLs are awesome. If you're not competing, you don't need W7s. I would go with a 10w3v2. The size of the sub depends on the music you listen to. If all you listen to is rap, 12 and bigger is for you. If you like rock with that fast doublebass, 10 is more your style. If those are still too hot for you, try MTX or Rockford Fosgate. They make great products that are a lot less expensive. Audiobahn is great, too.
IMO, Orion with those big subs that West Coast Customs uses for Pimp My Ride. Probably the loudest, but not the best. For speakers, the best are MB Quart. Expensive, so go with alpine or pioneer.