Upgrade on build!

I have this build, what would you upgrade.

  • CPU Intel Core i5-4670K 3.4GHz Quad-Core Processor
  • CPU Cooler Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler
  • Motherboard Gigabyte GA-H87M-HD3 Micro ATX LGA1150 Motherboard
  • Memory Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory
  • Storage Toshiba 3TB 3.5" 7200RPM Internal Hard Drive
  • Video Card Gigabyte GeForce GTX 660 2GB Video Card
  • Case Cooler Master Elite 431 Plus (Black) ATX Mid Tower Case
  • Power Supply Corsair CX 600W 80+ Bronze Certified Semi-Modular ATX Power Supply

What'd be on my list:

  1. HDD - It's not one of those really dodgy 45% failure rate seagate ones is it?

  2. GPU - depending upon what games you play, it might be getting a bit old.

  3. If you want to overclock:

    • Mobo - Can't overclock on that board, and you've got a K series CPU.
    • Better CPU cooler would be a good combo with the above
  4. Treat yourself to a nice looking case, and take the opportunity to deep clean everything as you transfer components.