On the low cost side I enjoy the Winexpert World Vintners Washington Riesling or Muller Thurgau. For a bit more, the RJ Spagnols Grand Cru International British Columbia Pinot Noir has great flavor after about 6 months of aging.
My favorite kits have been the Cellar Craft "showcase" kits. They've been the most expensive, too, for the most part. but even after aging for 5 years, they've made fantastic wine. Similar to a $30 bottle of commercial wine!
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