By the way with that build you will be screwed when the new consoles come out. That build will not even give "good" performance nowadays. The 6670 is not good for 1080p gaming. If you're going for such a budget build, get a monitor with a lower resolution like 1600x900.
If you have a Microcenter nearby, you could get a Phenom II x4+mobo for $100. 1066MHz RAM is slow for DDR3. 1333MHz will be better. I suggest you get a cheaper case, maybe for $40? The PSU is strong enough.