This is like asking the question: pinot or cab sav? The debate between Napa versus Sonoma is not a new one, and there are compelling reasons for both destinations. As a general guide, if you tend to favour cabernet sauvignon, chardonnay and merlot, Napa is your place. If, however, your sip of choice is pinot noirs, sparkling wines and zinfandels, head to Sonoma.