Originally posted by KDAFA
But more than that - with the K-3II (or for that matter, any Pentax body), remember that you can utilise Pentax Limited lenses, both the DA LTD and FA LTD ranges, with their superb image quality and famous, lovely rendering. And they're compact too.
Yet, Pentax DA Limited lenses (despite they are good optically) can't endure tough weather conditions because are not WR. Also, Pixel shift is useless in tough weather conditions (wind, rain, etc.). Keep in mind these 2 important things.
It's a tough choice...and that's coming from an ex Pentax user (a current Canon user). Canon needs good glass in order to get the most out from the full frame sensor and L lenses aren't cheap.
You can't go wrong with either of them if you ask me.