Smittie and Sal, I will definitely do a puffer jacket— just the vests feel more gearish to me—I plan to replace my sweater-weight puffer jacket this year, since it’s losing its puff. I think I need cardigans that aren’t cashmere, and probably a lightweight jacket or two (I recently passed on my denim and leather jackets because of poor fit). I do have a good trench coat for rain, but might want something more gearish as well.
As Sal suggested, merino seems like a good fiber for in-between weather. And I might look for another casual silk blouse. I also see a lot of lightweight duster cardigans in LA. I have one of those, but would kind of like another in a different color.