But it's such a small clock difference! How much extra FPS would i get from the OC version? It seems like it would be so small that it would not make that much of a difference. Right?
No, not really. You can just overclock it yourself if wanted. But the the most expensive ofc has the best cooler. I'd get a GTX 650 ti for that Money, it's faster than the Radeon 7770.