corsair hx1000 v2

Hi, so I'm planning to build a new PC and I was thinking about buying the Corsair HX750 V2 or Corsair HX850 V2. But after that, I noticed Corsair HX1000 V2 was actually the same price or cheaper in some stores. I know 1000W is overkill but is there a disadvantage over buying Corsair HX1000 V2...