For a wedding in Sonoma this July we're starting to look for wine options. With an estimated 150+ people, we'd like to find a couple of nice wines at $10-12/bottle. Costco? BevMo? Kermit Lynch? Somewhere else? I know Costco has a good selection, but I've never bought a large quantity from any of these places to know which gives you the best value. Opinions & suggestions please?