I'm going to assume most people prefer going aftermarket unless theft is a big concern in your area.
That said, the Factory Look can be important. Some GM cars from the mid to late 90's looked horrible with aftermarket radios as opposed to just cheap with the factory ones. How does this car look with aftermarket parts?
Are the steering column remotes standard or only in the audiophile package? Do they come off if I go aftermarket?
Now the most important part...with the speakers how much can I upgrade the standard system. The Audiophile package comes with 6 speakers + Subwoofer + amp + in-dash 6 CD Changer + small amp (I think). Can I upgrade the standard system to have similiar features? Would I be stuck either with the 4-speaker setup or trying to create extra mounts?