The Corsair V1 is manufactured by CWT (Channel Well Technology) which isn't bad. The V2 is manufactured by SeaSonic which is the best of the best.
The Antec High Current Gamer lineup is manufactured by Delta Electronics which is a name more known in the server and workstation industry. They are excellent.
I would personally go with the Antec since you can't get your hands on a CX500 V2
Yeah I think i'll go with Antec or Pc P&C, this Antec PSU is being discontinued?