For the love of all things holy, just get an i3-4150. It's currently the same price as the 4300 in the United States (not sure where you're living so can't guarantee that it's the same price elsewhere) and will DESTROY the 4300, beat the 6300 and beat or match the 8350 in just about every single game on the market.
You also will be buying into LGA 1150 which is a modern platform with real upgrade options (i5/i7).
Bottom line is, if you're going to game, don't waste time with AMD when an i3 is the same price and offers equal or greater performance.
Also, if you haven't bought the 780 yet, don't waste your money and get the newer GTX 970. Cheaper with greater performance.
If you need help fitting in budget, let me know...