So you can see the difference in the CPUs. They are fairly comparable. Raw Power, the AMD unit is better. In some tasks, the Sandy Bridge is better. I doubt you can go wrong with eaither one.
PassMark Intel vs AMD CPU Benchmarks - High End
Intel Core i5-3350P @ 3.10GHz - 6,112 Passmark CPU Score
AMD FX-8120 Eight-Core - 6,690 Passmark CPU Score
If it were me, I would add a 64GB SSD drive for another $69 for boot speed. And I would opt for the AMD FX-8350 Eight-Core, which is available for another $50. It is up to 4.2GHZ, or about 30% faster!
And if you plan to do Photoshop, add in a high end video card. The website also evaluates the different video cards. You might even consider 2 video cards that work together. I am doing this with my drafting workstation.