I do like my K-3 (Warning: Cat Photo)
As far as I am concerned the Pentax K-3 is a fairly capable piece of equipment. This photo of one of my Siberian forest cats was taken with the lowly 35mm/2.4 at f/3.2, 2500 ISO. Raw (DNG) converted in Lightroom, no sharpening (except the default sharpening applied by LR), no noise reduction, minor adjustments to black point, highlights and shadows, and a little extra shadow lifting and saturation to the eyes.
(I also shared this on the Pentax K-3 group on FB)