For gaming I would recommend either the HAF 922 or Antec 902. The Antec 900 series cases are one of the all time, best selling cases with gamers.
I would also recommend a Corsair power supply over Vantec. Corsair has a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Some of the newer models come with a 7 year warranty.