I happen to be an insurance agent, and while I've never heard of a discount for having a new roof or furnace, I know it's required to have them in good condition. Otherwise, you risk cancellation of the policy. Having no mortgage, raising your deductible, and alarm systems are definitely going to help.

M60s
VP150
QS8s
Marantz SR6003
Samsung LN52B550
Oppo DV-980H
Insignia NS-WBRDVD