So I up'ed my K20D to a K5, and with all the bad news that has been spinning about sensors, and mirror flops, I was half expecting to have problems, but.. Im happy to say, 24 hours in and its doing great!
Tested every lens on it, they are all looking good.
I am noticing some small differences from my K7, but alot seems to be the same. I DO like the FX button (now set to Exposure bracketing), the extremely high ISO (over the K7) and the much faster FPS.
One of the things I did notice was that DNG files were 20+ MB
vs the K7's 14 or so, and the K20Ds 10MB. Better camera brings alot bigger file size I suppose.