I'll second (or third, or fourth) the recommendation for 100% agave. A mini of Cuervo Gold turned me off of tequila - until I came across a tasting of Distinguido at my nearby Binny's. It's available in blanco, reposado, and añejo versions, all 100% agave, and all were out for tasting. A bottle of the reposado followed me home... it's very sippable neat, yet it's light enough to be good in a cocktail - which reminds me, I ought to mix a margarita or go fishing for tequila cocktail recipes on cocktaildb.com some time.