FWIW, and I hope as a help to others, I went with the folks I linked... $148/year for $25,000 in coverage. Includes theft, vandalism, fire, in transport, etc. Only water damage is not covered (and nuclear war!). Tried USAA, and was quoted for a valuable property policy... $394/year with a lot more hassle! Once again, USAA is completely uncompetitive, for damn near everything!
If you wish to insure coins, stamp collections, artwork, antiques, etc, you might have a look at Collectibles Insurance Service.