I would seek out tangelos. The Minneola is a very good one, which does well enough in Florida where conditions are more similar to yours than where sweet oranges are often grown. I don't really care for the Florida grown sweet oranges with a few exceptions. That said, there's not a whole lot of commercially grown citrus I find very appealing. The Minneola Tangelo is an exception, and it can be excellent. Peels like a mandarin, intense mandarin-like flavor, in a fruit whose size is closer to that of a sweet orange. It is also able to retain much of the acidity that is lost in fruit grown in climates absent of cold.
The Dekopon is supposedly a tangelo, but in my experience, the quality varies strongly, with those being grown in South-Western Japan being very good to eat. The soil in California by and large does not resemble the soil of Japan. There are a few areas where there is similar soil, but the soil combined with the humid climate and large temperature range is not something found in much of California at all. There are some areas with each factor, but they just aren't found together.