I you're in CA and doing business in CA, then you need to file your LLC in CA, or you will not like the response from the FTB when they find out. They will hit you with tax penalties because if you incorporate out of state but still do business in state... you still have to register with the Secretary of State and pay the minimum tax to the FTB. That's state law. That's why you should just file in CA. Now... some people manage to get away with not registering with the SoS... but others don't.
Personally... I couldn't do it because I'm a Notary Public and the SoS already knows I'm doing business in CA, so if I register out of state and fail to file in-state... I'm in some seriously hot water.
The $800 is a minimum tax for an LLC and needs to paid to the FTB within about 3 months of formation. That can go up if you make more than 250K a year... but I doubt any of us are at that point.
I'm staying a a SP for the time being with plenty of insurance, and may transition later. That's the advice I was given by an accountant... a good business insurance policy that will cover your liability will probably be less than $800 a year and is considered a business expense rather than a tax. He told me that a lot of small businesses in CA should go that way rather than form LLCs, etc. Of course... the state loses tax revenue that way... but really... our taxes in CA are about to double as it is.