I don't think Best Buy will install anything they don't sell. Yes that is everything you need. Its less than $100 more like $75 shipped.
The reason you would need the ex-10 is because it is a modulator, it converts the signal from your ipod into a radio signal that your radio can understand.
The thing about the ex-10 is it does much more. Its a touch screen, It charges your device, it has built in bluetooth for your phone etc.. Its all up to you what you want to do.
Alright, just let me know what your friend says because i dont feel like getting the EX-10 also for an extra $50 when i could just get the cable and adapter for around $50.
1998 Grand Prix GT Bone Stock and sexy new pics coming soon