Xigmatek use HEC to manufacturer their PSU's... at least most of them. And they are... garbage.. >.>
Corsair, Seasonic, Enermax, XFX, Sapphire, PC power and cooling , Zippy are all PSU manufacturers who go above and beyond in quality, performance, and warranty.
I'd go with a TX650 from corsair, or if you plan on crossfiring in the future a TX or HX 850. Depending on your budget. But also make sure the card they sent you isn't bad as well.
I5 3570K@4~5.0ghz: Gigabyte GA-Z77X-UD3H:Corsair Hydro H110 :16GB Corsair Vengeance DDR-3 1600: x2 XFX Radeon 7950 @ 1100/1575 : Corsair AX 860 PSU: x1 WD Black 1TB HDD's: 90GB Agility 3: 960GB SSD : Creative Labs X-FI:Corsair 500R Arctic White Edition:3 22inch Monitors Eyefinity @ 5294x 1050 : Alienware Tact-X Keyboard: Razer Naga :Corsair Vengence 1500 Headset: Corsair SP2500 Speakers