I visited the deYoung museum this weekend to see the Post Impressionist exhibit from the Musee d'Orsay and it was very impressive. Seeing Vincent Van Gogh's Starry Night up close was worth the price of admission alone. If you're in San Francisco I highly recommend checking it out. It was very crowded so you should buy tickets before you go. The exhibit runs through January 18th.
Some other favorites at the exhibit: