x2 on V Sattui. Also check out the website for "Heart of Sonoma Valley Wine Trail"...they have an event coming up in the beginning of March, Savor Sonoma Valley. Check out Loxton Vinyards if you can....its an Australian guy who relocated to Sonoma and he really has some great wines. Strangely enough, Kenwood was one of the nicest vinyards, considering they are mass producers of really affordable("cheap"), mass produced wine They have some dynamite higher end stuff and the grounds are awesome. Also, St. Francis vinyard is worth stopping to check out.
The only place that is consistently a dog has been Ledson...wines are not that good, and when we went to a tasting, one of the pairings they gave people was a chicken skewer, but the chicken was almost raw and a bunch of people were freaking out. They are really the weak link in that area.
If you are looking for dinner in Sonoma, check out "The Girl and the Fig", great food at pretty reasonabl prices, considering the quality and setting.