I've just finished installing the factory nav radio in my '04 Crossfire. It is a better radio. I don't know what the specs say but my ears say its better sounding. The best way I can describe it is the difference is as remarkable is the speaker mod that I did that was posted here. Its that different.

 

I'd believe it. I don't think the standard radio is very good.
I noticed a big difference when I replaced mine with a Pioneer aftermarket one. Then later I changed the amp and its ever better yet!