I heard the Xigmateks are not good and there are better than the Silverstone Strider. The ST70F is the weakest line Silverstone has to offer,
but it would work.
I would go with a
Silverstone DA750 or even a
DA650 if you dont plan on many upgrades. A Corsair HX620 would also work out nicely.
Edit: It might be a bit much, but the
Ultra X3 800is a great modular PSU and is $159, shipping is $2 and no tax.