I have the extended warranty on my 60d, I payed like $150 for it from the store I bought it at, it covers all malfunctions. IMO but I think its worth it, stuff happens and paying $150 for your peace of mind is better than having to buy a new camera.
As for homeowner's insurance, I talked to my dad about my camera gear and he said that it would be covered, but if they claimed the $2000-3000, their policy would go up, so if its worth it or not to claim it is up to you. He said if it ever got stollen it would be cheaper to just buy new gear than to claim it through the insurance.