$900 Gaming Build - Your opinion?

This is my first time building a computer myself, and I hope to have people with more experience check to see if everything works out fine (or, if possible, there's a better alternative to what's on the list).

Approximate Purchase Date: This week

Budget Range: Around $900

System Usage from Most to Least Important: Gaming, watching videos, surfing the Internet

Are you buying a monitor: Yes

Do you need to buy OS: No

Preferred Website(s) for Parts: Newegg, Amazon

Location: Phoenix, AZ USA

Parts Preferences: No preference

Overclocking: Maybe

SLI or Crossfire: Maybe

Your Monitor Resolution: 1900x1080 or 1900x1200

Additional Comments: Types of games>FPS games, RPGs, & Strategy Games.

And Most Importantly, Why Are You Upgrading: My current computer is an old, poor build, and it's time to move somewhere better.

Case
Antec Three Hundred Illusion Black Steel ATX Mid Tower Computer Case
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Motherboard
ASUS M4N98TD EVO AM3 NVIDIA nForce 980a SLI ATX AMD Motherboard
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Video Card
EVGA 02G-P4-2678-KR GeForce GTX 670 FTW 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

CPU
AMD Phenom II X4 965 Black Edition Deneb 3.4GHz Socket AM3 125W Quad-Core Processor HDZ965FBGMBOX
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Power Supply
PC Power and Cooling Silencer Mk II 750W High Performance 80PLUS Silver SLI CrossFire ready Power Supply
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Memory
G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL9D-8GBRL
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

I'm moving the hard drive ( http://www.newegg.com/Product/Product.aspx?Item=22-136-... ) and optical drive over, so those don't need to be included.

Thank you for your help.