Hello all, So I've recently traded in my 2010 Corolla for a 2009 Aurion Sportivo SX6 and absolutely love it so far. The only issue I have so far is the stock audio system. In my Corolla I had a straight forward setup, with a 4 channel amplifier powering my 4 door speakers, and a mono amp powering a 12' sub, with an after market head unit, which have been removed from the Corolla and are now waiting to be installed. However, because the Aurion has a few more fancy features such as reverse camera and steering wheel controls, it would seem a very expensive option to replace the head unit to one that is compatible with the reverse camera (which I would like to keep). Firstly, does anybody know the sizes of the speakers in the Aurion? I'm assuming the front door speakers are standard 6 inch, and the rear shelf ones are 6x9 inch. Please correct me if I am wrong. More importantly though, is will it be possible (and decent) if I simply run the stock head unit, with my 4 channel powering the front door speakers and the rear shelf ones, and my mono powering my sub? I know many stock units will work with this, but I want to make sure this will work 100% before I get someone to fiddle around with it. Any ideas, help, or contributions will be gladly appreciated, cheers! :)