A leisurely drive down the California coast

My wife and I have plenty of time to plan the details of our nine-day drive down the California coast—scheduled for later this spring, using the route shown below.  If you have a favorite spot anywhere along this route, please tell me about it. 

First stop is Napa Valley, where our perennial objective is to find a good, not-yet-well-known wine and ship a case or two of it back home.  (The first one we found like that was a wine named "Rubicon" in the early 1990s at Niebaum-Coppola.  In hindsight, I should have bought fifty cases of it instead of just one.)

After Napa Valley, the stopover points are San Francisco, Monterey, Santa Barbara, and LA.  A few places we'll be seeing: Carmel, Pebble Beach, Big Sur, maybe San Simeon,  Santa Ynez Valley, The Getty, and the Reagan Library.  (That last one is non-negotiable for me.  While we're there, I'll get a shot of the Berlin Wall section they mounted on the grounds.) 

Send me your suggestions; our plans are still pliable. 

Click to enlarge: