hey guys!! Ive got a 2004 ba falcon xr6 mkII and I thought it was time to upgrade the system... I have a asl ipod/iphone booster aux connecter, so ill just be using the stock h/u and since I dont have all the money in the world I wanted to add bit by the question is should I get speakers x4 front and rear..... or a sub first? which would sound better on their own? would greatly appreciate your opinions cheers