Seasonic PSUs are good quality units and for your build, you can go with S12II-520, M12II-520 EVO, G-550 or Focus+ 550 PSU,
pcpp: https://pcpartpicker.com/products/compare/bkp323,TgW9TW,fZyFf7,DPCwrH/
Focus+ is the newest PSU series from Seasonic and it comes with 10 years of warranty. Other listed Seasonic PSUs have 5 years of warranty.
All my 3 PCs: Skylake, Haswell and AMD are also powered by Seasonic. Full specs with pics in my sig.