1) I always recommend getting a UPS (Uninterruptible Power Supply), which has battery backup in case of power loss. Many of them also pass the current through their battery, thus conditioning the current before it gets to your computer's power supply. If a UPS trips regularly such that it does not switch to battery, it's a sign that you have some kind of surge or wiring issue at that outlet.
Well I have had the surge protector for longer than I've had the computer; its pushing 7 years.