Ok i just want to clear a few things up.
What size speakers are in the back of the car.
What is the difference between 10cm and 13cm even if power rating is the same i.e. why would it be better to get 13cm if they are both rated at 50watts rms.
Would putting a sub in the boot with 6*9s f**k up the 6*9s?
Could i have some components in the front, and some components in place of the back speakers and a sub?
Whatwould you recommend as some speaker upgrades... makes models to fit in the car?