After putting up with my Bose set up sounding less than great, ive decided its time to do something about it. Ive now worked out that the drivers door tweeter doesnt work at all and the mid speaker in the same door is sounding rough. This maybe as said before be down to the amp, But im thinking of changing the speakers too, I know i will need adapters to fit new after market items i know the fronts are 13cm items? but how deep can they be? The rears are 16.5cm ? is depth an issue with these? Do people have any recomendations? Im thinking of using a Boston amp to run the front and rear speakers or maybe an orion amp i have been offered.