You are considering high wattage PSU-lower quality PSU.
My suggestion in that you scale down to some 650W and get a good brande like Corsair or Seasonic.
It will be a better investment.
That's a steal for a psu that has:
a 9.5 performance rating from johnnyguru.com http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=140
80+ bronze certification
semi-modular cables
enough power for 99% of the builds out there and more than enough for any possible upgrades to that system which really only needs about 400-450 watts in it's current configuration.