Its also worth mentioning here that adding a whole house lightning and surge protection unit to the incoming service lines and installed at your circuit breaker box will provide some additional protection. I use that and an individual surge protector in front of the equipment. Unplugging is the only sure way to protect your equipment. Most of the warranties on damaged equipment can require you to send the units in for repair/replacement which takes a long time. Also, it is worth protecting all the sensitive electronics in your house, including the microwaves, ranges, refrigerators, washer/dryer, and all the myriad things that have tiny chips.