I'm still in the first phase of getting to know my GTO and everything I've read and seen states that the GTO has 10 Speakers with an amp. Does anyone know the location of all speakers and amp? I want to re-place the factory speakers with some better quality speakers but I need to find the correct sizes in order to plan my system accordingly. Also does anyone know of a manufacturer that makes a GPS/MP3/CD/DVD head unit that both fits the in the factory dash with no modifications and that also works with the Steering wheel controls and dash board display? I know it's a lot but I'm just excited to get mine the way I want it.