Trusted Advisors!
I have searched the forum but can't find a clear answer / indication if replacing my Radio 9 with a decent head (thinking about the Pioneer) and swapping the two factory speakers will be "good enough? "
Or do I need to add the two additional speakers and a sub to get a decent sound?
The data for your consideration:
1) A 6 mile round trip commute - about 10 - 15 minutes each way
2) Weekend trips of about 40 to 70 miles round trip for car shows and photo-ops in SF with my fellow Smarters

3) Listen to NPR/PRI (talk) 30% / KFOG the other 70%
4) Have an iPod and will use it from time to time, but not much
5) Will utilize Bluetooth
6) Used to be, but no longer
Thanks for your thoughts!!