Want some suggestion:which one is more better for me?

[jessie122]

I want to upgrade my car audio system.

I make the reference to the two items belowed:
http://www.autoaudiovideo.com/index....roducts_id=472

http://www.autoaudiovideo.com/index....roducts_id=393


The cheaper one looks ok as its functions is enough for me.

What do you think of them?
It is so bored to me to study the products description with some generic terms.
Maybe someone can give us more suggestion. Many thanks.