For a full tower case I would reccommend a Coolermaster HAF 932 or Antec 1200 it offers pretty much everything you'll need. Althought the CM Cosmos Pure is a great case too, you will be fine with one of the cases I mentioned for a bit lower price. A 850W PSU will be more than enough even if you plan on crossfiring your GPU later on, a corsair 850TX would be a great buy. The Velociraptor HDD is unnecessary when it comes to gaming, for $50 you can get the Samsung Spinpoint F3. Spending $150 for a bit faster loading times is a waste of money.