One of my favorites is San Ysidro Ranch in Montecito. It's by no means cheap, but it's lovely, laid back, with Relais & Chateaux-level food and service. Owned by the group who owns Auberge du Soleil in the Napa valley. JFK and Jackie spent some of their honeymoon there, and Vivien Leigh & Laurence Olivier were married there.