My budget mid-level gaming build. Suggestions pls

Approximate Purchase Date: this week

Budget Range: 500-700

System Usage from Most to Least Important: Gaming/surfing/streaming
Parts Not Required: keyboard/mouse/monitor/speakers

Preferred Website(s) for Parts: newegg.com

Country of Origin: United States

Parts Preferences: Amd Asi

Overclocking: Probably not

SLI or Crossfire:Maybe

Monitor Resolution:High
Additional Comments:I am just looking to play games like WoW, Starcraft 2, D3 if it ever comes out. Nothing too extreme.

CASE
RAIDMAX SMILODON Extreme Black ATX-612WEB 1.0mm SECC Steel ATX Mid Tower Foldout MB Computer Case
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

HDD
SAMSUNG Spinpoint F3 HD502HJ 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

RAM
G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-4GBRL
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

PSU
CORSAIR Builder Series CX600 (CMPSU-600CX) 600W ATX12V v2.3 Active PFC Power Supply
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

GPU
MSI R5770 Hawk Radeon HD 5770 1GB 128-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

CPU
AMD Phenom II X2 555 Black Edition Callisto 3.2GHz 2 x 512KB L2 Cache 6MB L3 Cache Socket AM3 80W Dual-Core Desktop Processor - C3 Revision HDZ555WFGMBOX
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

MoBo
MSI 870A-G54 AM3 AMD 870 SATA 6Gb/s USB 3.0 ATX AMD Motherboard
http://www.newegg.com/Product/Product.aspx?Item=N82E168...


This is my first time building a computer and I just tried to find parts that were good for the price and what I need them for. I mainly just play WoW and would start playing SC2. If any of these components are not compatible with each other or are overkill for my needs let me know. Thanks.