You buy a A10 for the superior integrated graphics.
You buy the i3-3220 for the superior cpu speed.
The A10 is as fast as the i3, and even faster in heavily multithreaded apps. The only reason to pick the i3 in this case is that it was the option that included the VASTLY superior 7770.
What I don't get is why the combos are so different. If you can afford to include a 7770 with the i3, then you can use a 7770 on the A10, too. Honestly I'd probably say at this point, spend $10 more and go fx-6300+7770. You won't be using the APU graphics anyway.