I could not find any independent reviews on the XIGMATEK 500W PSU. The NewEgg customer reviews were mixed and don't really shed much light on the PSU quality.
I used to have a XIGMATEK PSU and a case by them aswell and would have to say they both worked fine. The PSU provided good constant amount of power and even kept the PC running when it was using over 500w (Not much over-I don't recommend this !)
Just to let you know I didn't get rid of it due to it blowing up or the like; I just didnt think using my PC after the ground floor got flooded and the PC had a foot of water in it was a good idea.<--- That was an expensive PC repair
Quick heads up on the case, my buddy just built in it. It works great but the fan lights are bright and the fan itself can be loud. Something to think about if its going in your bedroom like mine is.
Best of luck with your build LOGIC.