I think one of the greatest Viognier's coming out of the US is Baron's Cailloux Vineyard. The 2013 Viognier Cailloux Vineyard offers terrific citrus blossom, stone fruits, white flowers and seashell notes in a classy, vibrant and racy style. It doesn't have the flesh or richness of a top Condrieu, but it has fabulous purity and length. Drink it over the coming 2-3 years.