Barnett Vineyards, up on Spring Mountain Road (on the edge of Napa & Sonoma counties) is a small producer (4k annual cases) that specializes on mountain Cabernet Sauvignon.
Robert Parker put Barnett on the wine industry map with strong scores starting in '91. The nice thing about these cabs are they are a not just fruit bombs they also have a delicate nature to them that indicates they'd age gracefully.
Also their Pinot Noir's are nice, not over the top or confusing but rather a balanced, pleasant yet a healthy conglomeration of flavors.
Lastly the Barnett property overlooks the Napa Valley floor, it's a beautiful location to taste and enjoy the scenery. I highly recommend adding this and Pride Mountain Wineries to a wine country trip itinerary.