If you ahve a WAMU account you can simply take advantage of their MMA’s that are paying 5%. The benefit of this is that if you ahve a WAMU account you cn move the money same day from checking or savings to the MMA. IF you are using other accoutns as secondary to your bank accounts you lose 3 days of earned interest while the money is in transit.
Anoth place to take a look is through COSTCO. They ahve a partnership set up with capital one that is paying over 5%.
I would also advise comparing this to CA Tax Free Muni bond funds offered through discount brokerage adn comparing the tax free rate vs the taxable accounts.