hello all i know i don't post much but i need some help, i have a 94 supra and i think it's time to upgrade the audio system. first let me say space is limited, i want to use a 5 channel amp because that's all it seem like i have room for. i will be using polk component speakers zx350.4 and they are 6 1/2, i also need some input on some bass speakers i don't want anything bigger than 10" i have a box to go in the stock location. any info will be appreciated. thanks.....