Do not go corsair, First of all the caps are not japanese/high quality, Second, the power supply you linked is only bronze certified, Third, Its a semi modular power supply.
550w Will be fine though.
Here is a much better Psu:
http://pcpartpicker.com/part/evga-power-supply-120g10650xr
First its made by EVGA who have excellent customer service if anything goes wrong.
Second: It has a 10 Year warranty.
Third: Its Made by PowerFlower Who are an amazing manufacturer.
Forth: It has excellent peak Efficiency.