i7-5820k: Good decision or flop?

[NKF98]

the CPU is overpriced

Actually though. Unless you're doing video editing the benefits that the i7 provides over the i5 (hyperthreading) are useless, no games or casual applications utilize it atm and won't need to in the foreseeable future. Get an i5 4690k, which is slightly cheaper, has better OC, and is better for Dolphin.

Also, Dolphin can use 3 cores, not just 2