blut.. how much money do you have to spend?
the factory door panels are 6x8's and 6x8's on the rear side panels, you're going to need to get a 6.5 mouting bracket to go in to the holes, you may also want to deaden your door while your at it or you will be annoyed to hell with the rattling. Also, with that big *** trunk you'd be best to go with 2 15's. It may cost a little more but if your going to be having this system for a few years then it would be worth it. Don't be stingy on your budget. Also for the type of music you listen to you would be better off going with a sealed enclosure for your subs. You can go to home depot and get them to cut the wood for you all you have to do it put it together and cut the hole for the sub. It's as easy as can be and will give you a lot better sound cheaper than a prefab box would. Also, if your trying to stay cheap go with profile amps, they have pretty good quality and do around their rated power.