That is a really large area to cover. Here in Santa Monica, Case Del Mar and Shutters are the two nicest places to stay right on the ocean, but the beach is quite large and there are lots of people going back and forth. Perhaps check out the Luguna Niguel area? It is one of the more resort-like/removed upscale beach areas I have visited out here. The Ritz Carlton Laguna Niguel is right on the beach and very nice.

While I have not stayed here, I have heard good things about Casa Luguna as a B&B. And if you check out the website, they have fireplaces!
http://www.casalaguna.com/