If I owned my home, I would definately get a safe, and I would consider insurance too. Your insurance cost is 1.3% of the value, which may be reasonable, but a safe could be a much better investment, depending on the value of your collection. Personally, I would get the biggest heaviest safe that I could afford, and I would bolt and/or weld that sucker into place so that it would take a bulldozer to move it!
Since I'm a renter, I put most of my valuables in bank safe deposit boxes. I pay about $200 per year for my safe deposit boxes, and my collection is worth roughly 15K. Something like 1.3% if I do the math correctly!