Need to replace factory speakers in my 2003 S Type (non R) and Crutchfield says 5 1/4" or 5x7 or 6x8. What's the real deal here, before I tear my door panels off I'd like to have the speakers in hand ready to go. I don't need a component system but would like a little more bass than a 5 1/14". Will the door actually take a 5x7 or 6x8 without having anything custom done to the door itself