Try Farmers Insurance, too. They go strictly by engine size, not bike type. The Busa costs the same as a Harley or other big bore bike with them. I pay $330/6 mos $100k/$300k liability and low deductibles ($100 or $200 as I recall) for Long Beach, CA ZIP code.
According to my agent, they also pay off on the full value you've got in the bike as long as you can prove it with receipts.
When I asked Progressive for a quote, the first thing they asked me was how I wanted to finance it. My response was if I had to finance it, I wasn't interested. I think their customers are paying big bucks for those full page ads.