I've always been with HAI as well, and the price has always gone up each year (or the benefits on the policy reduce to meet a target price).
The last renewal was the smallest increase of all so I hope it is not the start of a trend.
I believe the cost comes from the underwriter rather than the broker so even shopping around may end with the same price ??
Take a look at what you get for the money. May be worth going to named pilots to reduce cost. Even if with an AOC holder they will have a limited number of commercial pilots flying the machine.
h-r