I also recommend surge protector. I have 2 Belkins' back-up battery/surge protector units (550 V and 900 V) for all of my computer equipment. These units also clean the electric voltage/current so that all my computer equipment gets the clean electric current.
Even when I travel, I carry one of those surge protectors so that I can use it when I plug in my notebooks (and Airport Express base station) in a hotel.