Is 550 watts enough? Sure is.
Should you use the Corsair VS? No. You should not.
Why? Because the entire VS range is not designed for gaming loads at all. Even Corsair themselves only recommend using any VS power supply in light home/office builds built for word processing and internet browsing.
Please see the power supply tier list here:
http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html
Anything from Tier 1 or 2 is a solid choice, with Tier 3 options at a push.
A poor quality PSU, even ones from big brands like Corsair, have a much higher fail rate than you would want for a unit powering an expensive gaming rig. Its simply not worth the risk for the sake of $10-20.