A few years ago, we hosted a blind champagne tasting, with champagnes ranging in price from the 20s to Dom. No one knew which champagnes were which, because all were in brown paper bags. Each participant was given a rating form, and they gave numerical values. After the tasting, the ratings were compiled and the clear winner was Piper Heidsieck Brut. You can't go wrong. About $40, but YMMV.