A completely unfair question and relies on one's personal taste. Here goes mine, Chateau Petrus, from Saint Etienne. At over $1,000 you get silky smoth, full yet rounded wine that develops beautifully with every mouthful.
Pesquera and a large list of red Ribera del Duero tempranillo based wines. Of course, the year will also determine the quality of the wine, but price to quality ratio you cannot go wrong with this brand or region.