Corsair VS series are the bottom line of corsair power supplies that aren't even 80+ certified. If you don't have that yet I recommend an XFX 550w Core Edition instead
That XFX 550w Core Edition PSU I recommended is made by the best "Seasonic" with high quality components and capacitors while the VS650 is Corsair's lowest end PSU that isn't even 80+ certified and has budget components and capacitors
I would want peace of mind...hence why I wouldn't get a 550W for a 280x.
Do you own the PSU yet?
Yeah but you have a high end 650w PSU from the Corsair HX series, the XFX 550w PSU is considered high end as well and a high end 550w will easily beat an extremely low end 650w PSU. btw not really peace of mind, more like waste of power