I'm heading to Italy next week -- spending the first few nights in Rome (for which I have a long list of yummy spots thanks to Chowhound), and then off to Umbria (specifically Montegabbione). We will have a car, love food, and our objective is to relax by driving around the beautiful scenic area and eating amazing food. Any tips on some local/hidden gems in Tuscany and Umbria that we shouldn't miss? We are willing to drive as far as Siena (which is a little over an hour away). Cost doesn't matter, though we do really love restaurants with a rustic/local ambiance, and will be getting our fill of some fancy places in Rome.