What do you think about this PC build?

THIS, from PowerGamingPC

http://www.cyberpowerpc.com/saved/1F3VTU

The prize is $1129, my budget is 1100-1200.

And a resume:

  • CPU: Intel® Core™ i5-3570K 3.40 GHz 6MB Intel Smart Cache LGA1155 (Venom OverClocking Certified)
  • CS_FAN: Maximum 120MM Case Cooling Fans
  • FAN: Asetek 510LC Liquid Cooling System 120MM Radiator & Fan(Single Standard 120MM Fan)
  • HDD: 1TB SATA-III 6.0Gb/s 32MB Cache 7200RPM HDD
  • MEMORY: 8GB (4GBx2) DDR3/1600MHz Dual Channel Memory (G.SKILL Ripjaws X)
  • MOTHERBOARD: * [CrossFireX] GIGABYTE GA-Z77-HD3 Intel Z77 Chipset DDR3 ATX Mainboard w/ IRST, Ultra Durable 4 Classic, 7.1 HD Audio, GbLAN, 2x Gen3 PCIe x16, 2x PCIe x1 & 2 PCI (Extreme OverClocking Certified)
  • POWERSUPPLY: 500 Watts - Corsair CX500 V2 80 Plus Certified Power Supply
  • SOUND: Enermax Dreambass Genie USB Audio Amplifier w/ ultra light in-ear earphones
  • VIDEO: NVIDIA GeForce GTX 670 2GB 16X PCIe 3.0 Video Card (EVGA Superclocked)

My objective is to play most current games at full HD with a steady framerate (maybe 40FPS), i dont really know anything about the motherboard or how much it matters, and i chosed the NVIDIA card mostly for the PhysX compatibility, and i dont know if a sound card is really needed, this is my first gaming rig so i been asking in a lot and reading the basics... Anyway i already posted in the PCgamer forums, but i wanted a...less snob perspective XD.

Oh and i only need the CPU, i already have gaming keyboard and mouse, and a controller, and 2 monitors, one is 1080p 40", and the other is 1366*768 24".

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