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Having gone through a similar decision in terms of KP vs. K-70, I would suggest you try to hold the two cameras to get a feel for their ergonomics, if you haven't done so already. IMHO, the two cameras feel pretty different, and your preference may depend on the size of your hands.
Good luck with you decision...KP vs. K3ii vs. K-70; I'm guessing you'll be happy no matter which way you go!