I wonder what kind of improvement Pentax has done for the AF over the years. The SAFOX IXi+ seems to be just a quick upgrade; they were probably working on the X version long ago and just finished it recently, in time to test-release it with the K-5 MkII. Will it be a hybrid-type AF just like the one in Sony's A99, albeit to a lesser degree, or just... well, a "faster, more accurate version" based on the IXi+ hardware?
btw, if a non-AA filter version of the K-3 flagship is to be released... knowing how much P's engineers can tweak out a sensor, if it can rival the entry-level D600... good game, Pentax.