OK, friends, to wrap this up:
1. Have enough insurance on your own boat so that if it sinks, catches fire, or is otherwise destroyed, you have enough money to replace your boat. This should cover your boat, dinghy, electronics and other boat-specific gear you have.
2. Have enough personal property coverage to replace all of your other "stuff" that you keep on the boat.
3. Have a million dollars of liability coverage and make sure your pollution/spill coverage is maxed out.
4. You already have a Personal Liability Umbrella, right? If not, have a chat with your agent, or a good agent. :-)
5. Make sure you can live with your deductible. A $2,000 deductible will lower the cost of your insurance but it won't be too helpful if you have a $2,000 claim to file and not enough money to pay for the repair yourself.
6. Please read your policy and understand what the coverage limits are and what exclusions are written in. I have looked at about eight different comapnies' policies and every single one is different. This is a very different beast than car insurance, for example.