Beverage Tasting Institute isn't as comprehensive as what one might hope. Only 11 Armagnacs and 9 Luxury Cognacs (above XO) from 3 producers. The International Wine and Spirit Competition for 2010 has entries for 70 cognacs, 16 Armagnacs and 28 Calvados. Gilbert & Gaillard online does have entries for Cognac, Armagnac and Calvados. Another useful competition is Mundus Vini.

Has anyone encountered Cognac Grosperrin? This shipper specializes in Vintage Cognacs (yes they do exist) from specific zones within Cognac e.g. 1980 Grande Champagne, 1975 Bon Bois, 1954 Fins Bois etc. This shipper would seem to have a following in Europe. Two other well reviewed producers are Chateau de Beaulon and Famille Esteve. I have tried some of the cognacs from Chateau de Beaulon but not Famille Esteve.