Driving through south bay, namely San Jose, I think they probably have the best collection of Iranian restaurants, unfortunately I don't remember their names. Living in SF, the best place I goto regularly is Alborz on Van Ness. Note the only thing I ever get when I eat Persian food out are the different kabob's since they're hard to make at home without a grill/bbq. It's hard to find good stews ("khoresht") that aren't made by mom.