Keep us updated how it goes. Yes Peter knows his stuff, the Ardupilot 2.5 is a good controller, certainly does more than the Naza and its getting better each month as new firmware is released.
I don't think it'll be long before you upgrade the KK controller and start adding things like GPS and camera's, I know I didn't!
I filmed this at the Dez Chand meet in insanely high winds, I put my quad in Loiter and let go of the transmitter!