I work in the insurance field (dont throw the book at me) - Progressive or Geico are the ones to start with. They usually have great rates and their claims department are some of the best. Rates vary by state, Cali and Texas are the highest. County you live in (big) factor in the equation, age, tickets, size of engine, mods, any custom/extras you want covered, etc all factor into rate. I personally would have comp and liability on the bike, plus collision. I am insurance poor though, so what do I know.
Re-quote all insurance every 6-12 months, most companies change rates every renewal - good or bad.