Is this a new build? Why not keep the FX 6300?
I would, but there aren't any decent AM3+ mITX motherboards.
What resolution you plan to play?
Well, I'll be bringing along a 19" LED HDTV that I'll be using as a monitor. It has a resolution of 1366x768.
However, if the hotel I'm staying at has an HDTV that I can connect the computer to, I'll use that, so maybe 1920x1080 if the hotel TV supports it.
The OP hasn't got the GTX 660Ti yet so it isn't set in stone.
A10-7850k gets equal performance to i7 4xxxx @ 1080p with dGPU according to Guru.
Really comes down to which review you believe and which games you play.
http://www.guru3d.com/articles_pages/amd_a10_7850k_apu_review,16.html
The i3 wouldn't be a bad choice. The A10 7850k price seems a little expensive to justify. I would have through it would be cheaper by now.
That review helped.
So it seems like most games are limited by the GPU so the A10-7850K is fine.
Id honesly consider doing a haswell itx build over an amd apu build. Like a 4670k, decent itx board, 8gb memory, all in a Corsair 250D case.
The problem with that is price.
The 4670k alone costs as much as the AMD processor and motherboard.
And decent mITX 1150 motherboards are about twice the price of decent FM2+ boards.
That Guru review shows that pretty much any processor will run Bioshock the same. Clearly Bioshock only cares about what videocard you run.
If you are buying a $150 processor, just buy a used Sandy. Then you can at least run Starcraft at a playable level.
Ebay shows some used i5 2400 selling as low as $100 with shipping.
After doing a little more research, I think an A10-7700K will actually be what I'm getting.
It is $30 cheaper than the 7850K, and CPU wise is exactly the same, only the iGPU is weaker.
Since I'm using a dedicated card I'll save the $30.
The total cost for the FM2+ motherboard and CPU is only $230, and I'll have the ability to overclock, something I wouldn't have if I went the Intel route.