Ok, I admit it, i'm young and i want a HUGE stereo to go in my truck. Not only cause i like loud music, but because i need something to cover up the church choir in the transmission. I'm going to put 6x9s in the doors, and a new reciever in the dash. (the previous owner already cut a hole where the old radio was.) Where are good places to add more speakers? Mainly subwoofers and additional multichannel speakers?

Thanks,
Matt