I've recently booked a Corolla GLi automatic.

I'm planning to install a touchscreen audio system that also supports a navigation system. Now I have no knowledge of audio systems, their prices, brands or specifications. I want a good quality product and not a local Chinese brand, that may end up becoming a problem in the long run.

I'm also planning to install wider tyres (205/55/16) with new rims. How much will I be spending here and which brand should I go for? Also, should I go for wider tyres or thinner tyres keeping in view that I don't want to compromise the quality of the ride? Also, how much will my original Corolla tyres go for?