I have never heard of cougar before. It looks decent I would read the reviews on it and go from there. I am using a kingwin 850 and I am sure someone on here would say o I wouldn't use that if you paid me but in reality they haven't used one so they are going to bash it. Good luck.
the decision is ultimately yours, but you have my recommendation. A bad psu can not only blow itself up, but your whole system if it shorts. toms has a recommended psu list on a sticky, as well as many others who would recommend only a handful of companies. On paper, for the price, it looks like the best deal out there. whether or not it will cause damage to your system, or perform how that piece of paper says is another story. Do your research, and read reviews. I would also learn where the company gets its materials from.