Wow, a topic I can relate to.
Well, not to sound egotistical, but I've made several trips to Napa in the past 10 years and have visited quite a few wineries. Wine is my life!
The ones that stand out for Chardonnay, which is my favorite wine are Grgich Hills and Cuvaison. Far Niente makes a great chardonnay as well. My favorite Chardonnay reserve is BV year 95 and 96.
Best year for California Chardonnay? It so hard to say. I've been drinking the stuff for years so I couldn't really say. A stand out in my mind is a bottle of Grgich Hills 98 Chardonnay that was quite wonderful.
Best reds? The best Cabernet in my opinion in made by Caymus. If you like a mertage or "blended" red wine, you can't beat Insignia by Joseph Phelps winery or Tapestry by BV.
Sorry, dont' know too much about the French and Latin wines, I rarely drink them. I've been spoiled I guess with all the good California wine, and the fact that I live in California only makes me more biased!