Powercolor or Gigabyte or Asus

If I'm honest, they are all good brands but out of the lot the gigabyte would be my choice. First of all it has 3 fans which cools it down a lot; also the gigabyte one is overclocked so you will get more power out of that one compared to the others, unless you are planning to overclock if not go with the gigabyte. Gigabyte have always being a good brand in my opinion.