how about Corsair CX550 for crossfire?I can’t think of a good quality 500w. Are you actually running 2x570’s as listed is that a mistake? With a single 570 then 500w is plenty but you want a good quality unit so are actually looking at the 520-550 options of good models.
If actually running 2x570’s then maybe a good quality 650w but ideally 750w