Anyone in here a Rogue dealer?

I found a Rogue that I want...only one problem:

I am one of those customers that really, really likes an upgraded stereo system because I spend so much time in my car.

However, I understand that I can go to Best Buy or some other audio shop and get a kickin' stereo system.

What I am concerned about...is the idiots at Best Buy messing up the wiring on a new car and voiding my warranty.

Can anyone tell me what my options would be..I would like to research this issue BEFORE I go to the dealership.