Geoff,
Your right and some of the folks have provided details which is more meaningful. I'm strictly looking for baseline information. My in-laws are our insurance agents so I could tell you all about policies unless someone on the list is also in the business. One thing worth considering is going with a ballon liability policy that covers everything (house, boat, auto, etc). You can get much more coverage for a very reasonable price and most likely save money because you eliminate liability from your individual policies and use the blanket liabilty instead. The only problem is, you need to have no speeding tickets, DUI's, etc to qualify in general. My wife has a lead foot so everytime we haven't been able to qualify yet. I would encourage you who have clean records to ask your insurance agent about it. As for the replacement issues, that is also a factor as you point out.
shaun