I don't think (most) anyone is addressing your question. You don't want to dial in the stock, shite, stereo, you want to upgrade? You don't have the B&O?
Typically a place like Crutchfiled will have listed parts available for a make/model. That being said, most things will work and you just have to decide what you want. I have a 2005 Ford Super Duty. I have a mid-level system, including XM antenna, mid-level speakers, amp, subwoofer, etc. None of the system is stock, even the speaker wires. You can do whatever you want as long as you have battery power and a ground wire. The world is your oyster.
I would start with Crutchfield, look at products that fit your vehicle, read reviews. Pick a handful of products and put them in your cart. Read more reviews, then hit buy now and install them at your leisure. The vehicle is the limiting factor by the way. Stereo components are what they are, pretty kick ass, if you pick decent pieces. Whether they sound good is often vehicle dependent, and the Bronco will never sound like a sedan.
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