ALWAYS get agreed-value, if you can afford it. The rule of thumb that I heard is go $1000 more than you paid, and I do this religiously. Have never had a claim, but I want to be able to get at least as good if not a little better boat if I total. Also I carry liability in the $50,000 range...F-boat amas are expensive, and come to think of it, Nacra, Inter, and Hobie hulls are pretty damn pricy too.