Hexus posted a review on the Corsair CS Modular 550W
A quote from the article:
They say you can't have too much of a good thing. Component manufacturer Corsair is clearly of this thinking as the company is adding yet another range of power supplies to its burgeoning line-up, now encompassing eight distinct models. The latest entrant is dubbed the CS Series Modular, available in capacities from 450W through to 750W, and rated to the 80 PLUS Gold standard with respect to efficiency.Corsair CS Modular 550W Review @ Hexus