I would always recommend that you call around to compare. 10 years ago I was with Nationwide and was paying about 180 a month, I called Erie and got the shock of my life--they covered me for about 90 dollars for 9 months and the other 3 were free.
Now I am getting quotes a bit cheaper than Erie so I may switch again.
Crazy insurance companies, when I upgraded to a WRX (from a regular Impreza) my insurance dropped 40 dollars a year. I was told it was because the newer Imprezas were much safer.