As to not derail any other threads, there seems to be enough interest in wines here to merit this.
Living 90 minutes from Napa Valley has some bonuses. Like being able to drive up for an afternoon or for a couple of days for some wine tasting. Can't think of a better way to spend a couple days with the wife (other than fishing of course). I could go on and on but these are some of the wines that come to mind and I drink quite often.
Some of the favorites;
Hahn Winery - This is really good every day wine. The cabernet sauvignon, chardonnay, and pinot are all really good and about $10 a bottle.
Meiomi - Really good Pinot Noir. Good price too.
Cask 23 - Epic Cabernet. This is one of the wines that beat the French back in the 70's blind taste tests.
ZD - Most of their wines are really good, but I have a preference for the Reserve Pinot Noir.
Orin Swift - relatively new company that makes some really good wines. Palermo, Abstract, Papillon, and the one that put them on the map, Prisoner, are all really good. Prisoner is no longer owned by the company as it's been sold twice I think. Still a really good wine.
Silver Oak - They only do cabernet sauvignon and they do it quite well. I prefer the Alexander Valley wines over the Napa. Don't ask my why, they simply taste better to me.
Pahlmeyer - The proprietary red and pinots are really really good. Also the lower priced Jayson line is very good. Heck I'll even drink their merlot on occasion and for the most part I'm not a fan of merlot.