These are all quality PSUs : Antec, Seasonic, XFX, Corsair , PC Power and Cooling.
Lets hope your old one in one of these. But be careful, if it's faulty it may fry your brand new system. Seeing as were ready to go 1500$ why not buy new PSU, it won't cost more 100$, even less. And if you're prone to saving some money, you can sell that old psu on craigslist or smth. But that's your choice i'm just talking options.
Good luck with new build