If you really want an i7, get the i7-4790K.
The base clock is 4.0 Ghz, has a higher turbo speed (4.4 v 3.6), and can overclock farther than the 5820K (4.6 v 4.3), which means Dolphin will play more CPU intense games. It's also cheaper than the 5820K, while retaining hyperthreading for video editing.
It also costs less and draws less power, keeping it cheaper in the long run and letting it run at cooler.
It also supports more instruction sets (F16C, EM64T, SSE 4.1, FMA3)
The base clock is 4.0 Ghz, has a higher turbo speed (4.4 v 3.6), and can overclock farther than the 5820K (4.6 v 4.3), which means Dolphin will play more CPU intense games. It's also cheaper than the 5820K, while retaining hyperthreading for video editing.
It also costs less and draws less power, keeping it cheaper in the long run and letting it run at cooler.
It also supports more instruction sets (F16C, EM64T, SSE 4.1, FMA3)