So what model CPU and Monitor do you recomend?
The Core 2 Duo's are very low power consuming CPU's so by assumptions you might have a PSU of a low wattage?
The E8200 would definitely bottleneck a 7970 without a doubt, and without playing at high resolutions the GPU would be sort of underused. You'd need a CPU upgrade first to take full advantage of such a high end GPU. Advisable upgrades would be high end i3's or i5's at least. Or Phenom ii x4's to use the whole of a 7970 without bottlenecking.