Both the region of Champagne and its wines have always been associated with prestige and luxury. Knowledgeable wine enthusiasts have long discussed top Champagnes with the same reverence they reserve for the finest wines of Bordeaux and Burgundy. But everyday Americans usually keep Champagne way back on the high shelf. It's for big celebrations, send-offs, and wedding toasts and, more often than not, is bought by the case. The good stuff costs plenty--and...