[Solved] ~$600-700 Gaming computer

I'm thinking in buying a desktop pc for my first build, because as now I just use a laptop, and well it's a laptop, doesn't have a good video card.
I was thinking in buying this:

PSU:
http://www.newegg.com/Product/Prod [...] 6817341019
Memory:
http://www.newegg.com/Product/Prod [...] 6820231193
Motherboard+CPU:
http://www.newegg.com/Product/Comb [...] mbo.273358
DVD Burner:
http://www.newegg.com/Product/Prod [...] 6827151187
HD+Case
http://www.newegg.com/Product/Comb [...] mbo.280000
Video Card:
http://www.newegg.com/Product/Prod [...] 6814102858
Total: $680(After rebates)

COMPUTER USE: gaming, just gaming. My laptop is good for multitasking, music, movies, internet, so this computer will be just for gaming!!!
COUNTRY OF ORIGIN:USA
OVERCLOCKING: Later, when I have the computer running if necessary i will.(Later if needed i will buy a aftermarket heatsink, but not now.)
PARTS NOT REQUIRED: OS , monitor, keyboard, mouse
WEBSITES: www.newegg.com, www.tigerdirect.com, amazon.com
CROSSFIRE/SLI: Maybe in the future

If any other information is needed just ask.
Please help, is this a good future proof computer like for at least 1 year. In the future for sure I'm going some upgrades like a Phenom II X4 955, but for now that's my budget.

Depends on your monitor resolution and what kind of games you play. If you find the performance lacking in the future, just stick in another 5770

The graphics card affects gaming performance a lot more. The higher the resolution of your monitor, the more powerful graphics card you'll need. What exactly is your current monitor's resolution?

For example if it's a high enough resolution i.e. 1920x1080, then you might have to drop down the processor to that Phenom II X2 550/ X3 720 you mentioned so you'll have more money to spend on the graphics card.