OP, tell me more about the unit count, lanes, Can/US exposure, commodities and experience (losses/years in business) you have. I can guide you in the right direction with insurers, as far as the broker... you should take more time in deciding who should represent you. It's a matter of service and experience.
I hate to say it, but loyalty (with insurers) doesn't come around much anymore. Bottom line is, if you're not profitable for them they're going to dump you or jack you for rate until you dump them.
You need to find dollar savings whenever you can. Just make sure you're getting proper advice when going to market and don't invite 100 jokers... oops, I mean brokers in to quote. It lowers your credibility in the quoting process. Take your broker to market against 1 other broker if you need to... but no more than one. There's not that many markets out there.
Good luck - let me know where I can help.
We just renewed last month, was with the same broker for over 15 years. Went to market back in May and had 3 brokers quote. Seems there are approx 12 insurance company's/groups out there. Depending on your size of fleet, we found under 30 truck you get grouped into with True, Linc's or Bluesky ad a few others. Northbidge, Economical, AIG, and a few others are out there but you need to match there criteria. All in all there was a $50,000 spread between the high and the low, which is a huge chunk of change. I do caution buyer beware, as you get what you pay for, but am happy with my new broker so far.