The best combination?

Combination 1
Intel Core i5-3450 @ 3.10GHz £148.97
ASROCK Z77 EXTREME4 £102.97
XFX HD 6850 £86.02

OR

Combination 2
Intel Sandybridge i5-2400 £138.96
ASRock Z68 Pro3 Gen3 £70.47
XFX HD 6870 £114.10

OR

Combination 3
Intel Core i5-2500K 3.3GHz £164.94
ASRock Z68 Pro3 Gen3 £70.47
XFX HD 6850 £86.02

So hard to choose. They all fit my budget in different ways. [Let's pretend I don't want to overclock - Although if I was to pick Combination 3 I'd probably buy a hyper212 evo in the future & Overclock. I've put alot of thought in each of these combinations. So which do you think would be the best?

What i'm going to be using my build for : Gaming - Photoshop - Editing