Of course, it does depend on the native voltage of the place he's going to use the machine. A 240v power grid is far more resilient than 120v against low voltage events. And a computer with an APFC PSU running on a 240v input will be pretty well immune to low voltage events that don't completely cut the power off (unless they drop below 100v for a sustained period).
On 120v supplies, I see a real need for low voltage protection, as even a cycling refridgerator can cause minor brownouts inside the house.
Please move to a real household voltage.
The rest of the world.
Intel i7-2600k with an XSPC Raystorm water block, 4x4GB Corsair Dominator, SLi Evga-GTX560Ti-448 FTWs, Asrock Extreme4 Gen3, Crucial M4 256GB SSD, Samsung Spinpoint F3 1TB HDD, powered by a Silverstone Strider+ 850 PSU in a Silverstone TJ-07BW case.
I'm not buying EK GPU blocks ever again. (One GPU killed)