I would recommend E3-1230V2 or V3 if you do not plan to OC.
If you are going to OC, I would recommend i5 3570k or i5 4670k.
Those are my favorite
E3-1230V2 and V3 are the hidden diamonds from Intel. They are basically i7 3770k/4770kbut without OC part and without the integrated GPU...and...they are about as cheap/expensive as i5 3570k/4670k.
Some more thoughts:
I would say instead of i3, I prefer FX6xxx. i5 is however still my favorite for bang for bucks (or the E3-1230Vx).
FX83xx is also good if you would like to have AMD instead of Intel i5. i5 is better for my taste tho'.
If you have enough cash, i7 3770k or 4770k is also nice.
Now the GPU, I would not recommend going lower than HD7850. With HD7850 on 720p, you will have better resource buffer in the future. But if you are short of cash, HD7790 is fine