2015: Which CPU is good enough?

[sulblazer]

If the 6700k cannot play a game, then it probably means the emulation is broken for that game. Sounds like money is not too much of a concern and since your current system is not ideal for Dolphin, get the i7 skylake. You'll be very happy with it and will not regret it. It'll be able to run most games on Dolphin and PCSX2, and PC just fine. Come back and let us know how you like it!