which speakers to go with?

The 62.9i's aren't 6x9, they are 6.5"s. When you say the whole back deck comes out as one piece with amp and all, do u mean itll kind of be like a hatch back with it removed? Youll be able to see in the trunk? If so, would it be a bad idea to build the subwoofer enclosure to take the place of the back deck? With the sub and port showing where the rear deck used to be? If that were possible, it would be nice because then I could just build a wall mid ways in the trunk and keep half the trunk.

No, the speakers and amp are mounted in a plastic enclosure that is clipped to the underside of the parcel shelf (might be a bolt too depending on your model year.)  This assembly comes out as one unit, but the parcel shelf remains in place.Support the12volt.com