buy the monster cable, it sounds 10 times better.
but to make ur set up even better buy this charger, it has an audio out so all u do is connect the dock connecter and it charges and plays music at the same time, also gives the set up a cleaner look.
it is worth every penny, the only trick part is how u mount the ipod, i have an ipod mini so mounting it was very simple, i just screwed the belt clip into the black trim piece next to the ECC, make sure u do not hit any wires. Then put a bolt on the screw to keep it in place. I ran the wires behind the trim piece and down along the console and used the back cigarette lighter.
If u dont have a ipod mini you can buy a belt clip or use a vent mount. Either one works good.
This is a picture of my set up.
pic of the mounting