Those XFX units are very solid so no issues there, but that's overpriced and you can do much better for the money.
If you can use the mail-in rebate these $50 750W EVGA units are of similar quality, but they're semi-modular and higher power (probably complete overkill in fact, but there's no harm in that)... all that for half the price (if the rebate works for you). Even if you can't use the rebate, they're on Amazon for $15 less than the XFX unit. http://pcpartpicker.com/part/evga-power-supply-110b20750vr