After a long debate with myself, I've finally decided to purchase the iPod classic. The only other problem I'm having at the moment is whether I should get it in black or the new "silver." I need to buy something at Apple to allow my iPod to play in my car ('07 Jetta) because it has a built-in iPod adapter. They're bound to have whatever it is I need there, right? Is there any certain information that I need to give them or is everything pretty general and universal?