$600 Budget Gaming Build - Need Advice

Hey guys,

I am planning to build a $600 budget gaming pc and would appreciate some advice.

Approximate Purchase Date: (e.g.: this week (the closer the better))

Budget Range: 600 (After Rebates)

System Usage from Most to Least Important: Gaming, Watching Movies, Surfing the Web

Parts Not Required: Keyboard, Mouse, Monitor, Speakers

Preferred Website(s) for Parts: Direct Canada, Newegg, NCIX, Tiger Direct, Memory Express

Country: Canada

Parts Preferences: Trustworthy Brands

Overclocking: No

SLI or Crossfire: No

Monitor Resolution: 1920x1080

Here are a list of parts I have already selected:

CPU:
Intel Core i3 2120 Dual Core Hyperthreading Processor LGA1155 3.3GHZ Sandy Bridge 3MB
http://www.directcanada.com/products/?sku=16950BD4011&v...

Mobo + RAM:
Gigabyte Z68A-D3H-B3 ATX LGA1155 Z68 DDR3 3PCI-E16 2PCI-E1 HDMI DVI SLI SATA3 USB3.0 Motherboard
Patriot Sector 5 PGV38G1333ELK 8GB DDR3 2X4GB DDR3-1333 CL 9-9-9-24 1.65V Dual Channel Memory Kit
http://www.ncix.com/products/index.php?sku=68040&vpn=Z6...

PSU:
Corsair Builder Series CX600 V2 Power Supply
http://www.memoryexpress.com/Products/MX32939

Case:
Zalman Z9 Plus Case w/ Fan Controller
http://www.memoryexpress.com/Products/MX31654

HDD:
Western Digital 500GB Caviar Blue 7200rpm SATA III w/ 16MB Cache
http://www.memoryexpress.com/Products/MX32264

GPU:
ASUS Radeon HD 6850 DirectCU 790MHZ 1GB 4.0GHZ GDDR5 2xDVI DisplayPort HDMI PCI-E Video Card
http://www.ncix.com/products/?sku=56356&promoid=1382

Some questions I have are:

Is the PSU sufficient to power the system?
Are all the components compatiable?

Thanks everyone!