Oh and as for the other items:
1. You will need a wiring harness adapter.
2. If you have steering wheel audio controls and you want to continue to use them, you will need an adapter/interface.
3. If you want to take advantage of Sirius Radio or Bluetooth for your cell phone, you will need to buy adapters/units for each.
4. Be careful with upgrading your amp and speakers. Make sure that you get one that is going work all together on the correct OHMS. I think the factory speakers are 2 ohms (may be wrong) and many of the new ones are 4 ohms. Whatever the case may be, just make su