Car Stereo's, after Ford Cars, the thing I love the most;
Now, my advice, always buy speakers after market, unless you drive a Porsche or a Volvo. The speakers car makers put in their cars are a joke. They are cheap mass produced items costing as little as a few bucks each. The best way to improve sound is to replace these first.
Then you look at source units. One can buy a decent cd/tuner for around 350$ now. Couple this with an external amp, the amps in the source units are lucky to pump out 10watts rms a channel, and perhaps after that a sub.
The important thing with car stereos though is placement. I think Ford does a pretty good job in this regard. The system I had in my XR8 Pursuit had great image and sounded pretty good for a stock system. The system in my EL isnt bad either.
But both lack clarity, and the ability to crank. If you compare a well set up after market system it will blow and factory system away.
I am about to stick a cd/tuner, dsp, 3 amps, stacker, 2 15 inch subs, 8 other speakers in my EL.....
I could go into much more depth, but I wont bore you all to tears, but if any wish to chat about systems be my guest.................