I would just get an fx-6300. No sense paying the same for a quad core A10 if you aren't going to make use of the GPU portion.
I compleatly agree the six core chip you suggest makes the most sense. Only reason I can think of in wanting the A10 would be if your discrete card ever fails or you want to move it to another system you've got something to fall back on. Additionally the A10 might be able to be used in Dual Graphics mode with one of the newer 7000 series cards however I have not researched that possibility.