SF and Napa area--Need dining recommendations

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Hi, my mother and I are taking to trip to the Napa Valley and SF in late June. I'm looking for dining recommendations. We'd like to do one special, money-is-no-object kind of dinner (within reason though, we can't afford the French Laundry or anything like that) somewhere in the Napa area. I love Asian food and I'd like to find a good sushi place in SF. Any thoughts? This year is my mother's 60th birthday and I'm taking her on an all-expense paid trip so I want to make it memorable!