I know this may stir a hornets nest, though like a lot of people our time is short in these wine areas. Any help to narrow down the wineries would be appreciated. Just to help, our thoughts thus far are: Coppola, beringer, domaine chandon ?? Also we're not interested in any tours, just after some of the best wine that Napa and Sonoma makes, so that when we finally get back to Oz we have some memories of our trip that we can drink! Thanks.