2011 Avalon Navigation System!

[Bader]

Hello guys,

I'm Bader from Saudi Arabia. I have 2011 Avalon (Limited) not equiped with navigation system. Our dealer doesn't offer OEM Navigation System for the new Toyota Avalon. It offers cheap systems with high price and doesn't look good when installed (kindly look at our dealer's system):





My car as I mentioned previously not equiped with navigation system. It has a normal JBL Audio System as shown in this picture:




I found some American Dealers offering used OEM Navigation Systems with good prices. These systems include all the parts needed in addition to the touch screen (e.g. GPS receiver, CD, ... etc), and we have skillful technicans who can install it well but I have several questions since your dealer offers AVALON LIMITED with/without Navigation system.
This is the system I intend to get:




My questions are:
1- Are there any differences between Limited with NAV and Limited without NAV regarding the inside mirrors?
When I move the shifter to Reverse the back view will be shown on the mirror itself as shown:




If I install the new system what will happen to the back view? will it appear in the screen , mirror or both?
Do I need to change the mirror?

2- I have 12 speakers in my car including subwoofer. Will this system support all of them?

3- Can you tell me your opinion about what I think about?

[AvalonForLife]

I have a 2011 Limited. You don't have to change the mirror if you don't want to but yes they are different. My car has the factory nav with 12 speaker system. when put in reverse the image comes in on the nav screen.