Where can I go really as far as CPU's? I didn't really know many games were utilizing more than four cores right now. Though I do know 2.8 GHZ is a bit low.
It's not about the number of cores, it's about the per core performance... a Phenom II x4 "Deneb" sometimes perform better than the "Thuban" and of course it exceeds "Propus".. your current Athlon II x4 core.
When running your CPU at a high clock speed, the processor becomes faster in handling the data between the other components.
That's why you wanna seek one of the Phenom II X4s
For the GPU, if you're running under 1080P resolution, HD 6970 will be more than enough, if you're playing at 1080P, get the HD 6970 and CF it when the prices drop