I need to make a choice between 2 PSUs. I can buy new Corsair HX750 or used Enermax Modu87+ 800W without warranty. Enermax was used for test purposes, been stress tested till protection kicked in. So which purchase would be more adviseable in a long run? Thanx. edit: Forgot to mention price difference. Corsair is 150€, Enermax 120€. And maybe in near future upgrade to 570GTX.