What's the best car insurance company? Your experience?

I just purchased a new car and my family and I have about 4 cars currently under farmers insurance and pays way over $200 on car insurance...the dealer at the agency mentioned that he bought the same car and has 4 other cars with Nationwide and pays under $200 full coverage. In your experience and in your opinion from what you know or have experienced which insurance companys over the best service for your buck or offer great options. I think we are paying a lot and the options aren't that great. Thanks