In the past I have purchased from these guys and I have never received a bad bottle of wine.
http://www.windsorvineyards.com/windsor/index.jsp
I used to purchase cases and give them to clients. I always took care of my CPA too. She shared a bottle of Cabernet Sauvignon with the owner of local 5 star restaurant and they went nuts over it.
I might order a couple of cases this year.