Can anyone with K3 II share their pixel shift experience? Do you find it useful for your shooting and what kind of shooting do you get the most out of your K3 II. Besides pixel shift, does K3 II have any noticeable upgrade from K-3. Please share, I am thinking of an upgrade from K-5. I am very happy with K-5 but I want my next Pentax body to be faster so that I can use it to cover more shooting interest as in occasional birding and casual sport events for my boys such as summer baseball. Thanks!