Hell no, the i7 is not worth it. Here's a gaming chart from Battlefield 4. It should set you straight:
As you can see, it doesn't even really bottleneck the mighty GTX Titan with an average frame rate of 60 and minimum of 49. Seeing as the even MORE powerful i7-3930K is only 4fps faster at minimum and 8fps faster on average, one could expect an average fps increase of maybe 4 and minimum fps increase of maybe 2 on the i7-3770K. You tell me, is that worth a price difference so large that you could buy an FX-8350 and an FX-6300 and still have $10 left over? I sure don't think so.