^I'll fill in then...
Diablotek makes PSU-shaped objects that should not be attached to delicate electronics (such as computer components) if there is any possibility they will be connected to an A/C power source at the same time. They tend to be good for no more than 50% of their labels, and that not cleanly. They are prone to glorious deaths, taking other parts with them into the fiery abyss.
A quality modern PSU has full range active PFC (no little voltage switch) and some level of 80+ certification for efficiency. Seasonic, Antec, and Corsair make inexpensive units (<=$45) that are very good.