It's a decent PSU, but if you are looking for a PSU for such a high end system I would personally go with a unit that is a bit more powerful, more efficient, higher quality construction, long warranty cover and has modular cables.
For example
this £82 XFX 650W supply has modular cables, a seasonic design (so nice quality) and a five year warranty (the corsair you mention is only covered for three years).
Also, the
Antec Truepower New 650W is another nice modular, seasonic-made PSU that is worth considering.