I'm looking to make a big step up from my current Phenom 965, so I decided to head directly to a modern i7. My application for the CPU will be gaming and video/photo editing as well as general computer uses. The fact that this computer will also be used for tame applications instead of 24/7 heavy duty ones tells me that the lower power consumer, the 4770k, will be the better option. The 4820k's power consumption is exponentially larger than the 4770k's (approx. 68 watts vs 130)
http://cpuboss.com/cpus/Intel-Core-i7-4770K-vs-Intel-Core-I7-4820k
http://cpuboss.com/cpus/Intel-Core-i7-4770K-vs-Intel-Core-I7-4820k