I would also be using a GTX 670 while amateur video editing (using HD footage) on Adobe Premiere CS6. I was about to buy my build (http://pcpartpicker.com/p/uir7 if you're curious) but I just got the opinion on not buying the i5-3570k. It's currently late to make the change to an AMD counterpart as I'm a LOT more comfortable with my knowledge of Intel CPUs and I'm buying the build tonight. I was just hoping that the i5-3570k (alone or with the GTX 670) would be satisfactory.