The CX550F is a snazzy and effective mid-range PSU, but it is on the pricey side.
The power supply (PSU) is one of the most important components to think about when building your own PC, as it's what will deliver power to every other part of your PC. Your rig won't even power on if you don't have a PSU that provides the watts your hardware needs, and a PSU that runs inefficiently will generate tons of heat and noise. Therefore, getting an efficient and reliable PSU is critical.
Full story from the WindowsCentral blog...