I personally feel that you spent way more than you otherwise needed to. To start with, your system would have all the power it would ever need with a quality-made 450W power supply. Then there's the fact that each new generation of GPUs and CPUs requires less power than the previous. Not only that, but a PSU with as much power as the AX860i would be able to power your system with three GTX 680s in it.
Not only that, but I personally feel that this is a gimmicky PSU. I personally think that I would probably use it for one day and say "hey, that's pretty cool", and then never use it again. I mean, I don't see a need for it with such a high-end PSU.
Anyway, I'm just sharing my feelings on it.