Will I be able to max out every game with anti-aliasing with a GTX780 with an i5-4670K? Will the i5 to an i7-4770K be worth it? Will be playing at 1920x1080p most likely.
If your budget already had two 780s, then I'd say the next best place to spend money would be a i7 but I just can't see upgrading from a 4670k to a 4770k