I've just been reading a thread stating that blackouts (reason for UPS) only cause you to lose unsaved data but do not damage hardware. Only power surges damage the hardware. I'm not worried about losing data because I'm constantly pressing the save button. I don't mind my iMac shutting off if there is a power cut as long as I don't damage the hardware. Will just a surge protector suffice for me or can blackouts actually damage the hardware?