(WSJ) - I don't get many story ideas at cocktail parties. (I'm usually too busy wondering when I can leave.) But at a party a few months ago, a man asked me a question that I thought deserved not just an answer but an entire column: "What are some of the most reliable Napa Valley Cabernets?" My questioner had tried many Napa Cabs over the years but hadn't found one that he consistently liked. They didn't taste the same from vintage to vintage, he said. One year was good, another much less so. Were there producers whose wines were consistently good? There were, I assured him. Here is my answer, in much longer form.