California - Ventana vs. Post Ranch Inn

I'm looking for somewhere to spend a decadent long weekend for a major decade anniversary next June. I'm thinking about one of these two places, and wondering what people think of them. Any other suggestions welcome!

I haven't stayed at either place but I have had lunch at Ventana. It has a spectacular location and the food is quite decent. I also understand Ventana is a clothing optional property (not in the restaurant, however).