I have a 1997 Chevy Lumina and I would like to do some work on the audio system. I have no clue where to start. I would like to take it one step at a time and replace the speakers first and maybe the deck, and later down the road put some subs in. Do i need a amp to replace the speakers? Do i need to get a new deck at the same time? What size do i need to have the speakers be for the front and back speakers? Any help is appreciated.