Is this desktop setup good for gaming?

Definitely a killer build, but why not order direct from cyberpowerpc.com and make sure you get name brand components? The power supply, RAM, and disk drives are the location where OEMs will reduce costs when it comes to retail solutions so a lot of times you'll end up with some not so good components off the shelf.

Start with the X79 Gamer Infinity 8000 build and modify as such:
*BASE_PRICE: [+1209]
CAS: * Cooler Master Storm Stryker Full Tower Gaming Case w/ 200mm Fan, Integrated Fan Controller, Front USB 3.0 & X-Dock, and Easy Carry Handle [+96]
CASUPGRADE: Flexible LED Interior Light Strip [+19] (Red Color)
CD: LG 12X Internal Blu-ray Drive & DVDRW, 3D Playback Combo Drive [+41] (BLACK COLOR)
COOLANT: Standard Coolant
CPU: Intel® Core™ i7-3820 Quad-Core 3.60 GHz 10MB Intel Smart Cache LGA2011 (All Venom OC Certified)
CS_FAN: Maximum 120MM Color Case Cooling Fans for your selected case [+15] (Red Color [+0])
FAN: Asetek 510LC Liquid Cooling System 120MM Radiator & Fan (Enhanced Cooling Performance + Extreme Silent at 20dBA) (Dual Standard 120MM Fans (Push-Pull) [+9])
FREEBIE_VC: FREE $150 Value In-Game Hawken, Planetside 2 and World of Tanks w/ NVIDIA GTX 660 or Above [+0]
HDD: 120 GB Intel 520 Series SATA-III 6.0Gb/s - 550 MB/s Read & 520 MB/s Write [+71] (Single Drive)
HDD2: 1TB Western Digital Caviar Black SATA-III 6.0Gb/s 7200 RPM HDD [+112] (Single Drive)
IUSB: Built-in USB 2.0 Ports
KEYBOARD: AZZA Multimedia USB Gaming Keyboard
MEMORY: 16GB (4GBx4) DDR3/1600MHz Quad Channel Memory (Corsair Vengeance [+29])
MOTHERBOARD: (3-Way SLI/CrossFireX Support) ASUS P9X79 Pro Intel X79 Chipset Quad Channel DDR3 ATX w/ BT GO, SSD Caching, 7.1 HD Audio, Intel GbLAN, 4 Gen3 PCIe x16 & 2 PCIe x1 [+130]
MOUSE: AZZA Optical 1600dpi Gaming Mouse with Weight Adjustable Cartridge
NETWORK: Onboard Gigabit LAN Network
OS: Microsoft® Windows 7 Home Premium [+0] (64-bit Edition)
OVERCLOCK: No Overclocking
POWERSUPPLY: * 1,050 Watts - Corsair HX1050W 80 Plus Gold Power Supply - Quad SLI Ready [+187]
RUSH: No Rush Service, Estimate Ship Date 10 Business Days
SERVICE: STANDARD WARRANTY: 3-YEAR LIMITED WARRANTY PLUS LIFE-TIME TECHNICAL SUPPORT
SOUND: HIGH DEFINITION ON-BOARD 7.1 AUDIO
VIDEO: NVIDIA GeForce GTX 680 2GB 16X PCIe 3.0 Video Card [+389] (EVGA Superclocked [+60])
_PRICE: (+2367)

This gives you a PSU that will have enough power for a possible triple-SLI setup plus name brand reliable SSD and HDD, and solid RAM.

I chose a case, fans and internal lighting to match the White/Red color scheme.

The only thing you give up is that cool touch screen for the cpu cooler, but the Coolermaster Storm Stryker is a much cooler looking case (though a little less conservative).

The build above is only $70 more than the best buy offering, but offers all name brand parts leaving nothing to chance.

Or experiment a little with you choices. They'll build to order. Use SPRING0410 promo code to get 5% off and add shipping and it's basically the same cost as the best buy PC.