Hmm! i'm from Canada and Huntkey isn't exactly a household name for psu's.
I know about them but that's about it.
From this review it looks like a decent unit. http://www.itocp.com/htmls/47/n-647.html
However a couple of things turn me off .
85C caps on the secondary
It's by no means a 900W unit most likely a 750 or 800W.No mention of continuous watts.
On the otherhand the TX750 uses all 105C caps and features a 5yr warranty.
The 750W rating is continuous and peak is higher.
Personally i would buy a TX750V2, XFX 750, Antec TP750 if you can source one.
Known good units.
The first product named X7 comes with 900W continuous output, SSI EPS12V design, and 80Plus Silver high efficiency. It targets gamers and overclockers who have a multiple GPU rig and care about cost benefits.