One of the most profound statements made to me when discussing new technologies in the car was made by a wise man who created some of the old printed consumer publications that unfortunately are now defunct (well, some still exist but not in our country).
Anyway, his advice still stands true today no matter how much the market has changed: "Never underestimate the value of entertainment." Not to turn this on my own listening habits, but I rarely find myself listening to my own media in the car. I prefer letting new technology to spin the 'wheels of steel' to rock my dash. I get a kick out of discovering new music, and no matter what new format you choose there are still enough of your old favorites being played on them.
SiriusXM was my go-to for the past 10 years—even though the audio quality might not be good enough for the purests (my favorite line by an industry wag was 'all of the fidelity of a greeting card audio chip'), some of the music content is amazing. Turning the dial you can always find something new, and now that the channel numbers have merged between both platforms it makes it easier for the end user. No more 'It's channel 59 on my Alpine head unit, what the hell is it on my Sony?'