Depends on your budget mate. Theres a lot of good ones out there. I would go for a 650-750 W model.I have currently a lower psu (corsair cx450m bronze) My PC's components consist of gtx 1060, ryzen 7 1700, 2x4gb ram and asrock b450m pro4 mobo.
I am looking for a good psu that'll last me for a bit and that I can possibly do some OC with. Thank you