Well you are going to want something that has at least 24A or so on a rail to support newer graphics cards. Another thing you are going to want to look for is the power efficiency rating. The one I linked to is Gold Certified which means that at 50% power draw it was at least 87% efficient. A psu that has a higher efficiency rating is made with better components and will typically last longer. The rosewill psu you have is rated only >70% which is abismal by psu standards
Thanks!! Rep it up!!