I went out to pick-up a K-5 on Friday, but it turned out to be problematic(wouldn't focus at all). So I skipped it and waited for some new stock to come-in. I Picked-up a replacement today and everything seems to check-out okay, so I took it home.
It's still a bit early to tell for sure, but its looking as though it came without any of the focus issues in low light. It certainly is showing some notable AF capacity in low light in contrast to the K20D though it doesn't have the zip, lock, click the D700 has. Perhaps, I'll need to tweak some settings to help improve in that area still.
Whatever the case, I'll setup some charts later and run some tests against some other bodies to see if I can't draw some better conclusions. Though the real test, will be when I put it to work in the skating rink this coming weekend.. :P
Beyond that... I will admit, that I do find the K-5 to be a bit small in my hands. I've always considered the D700 a man's camera, and the K20D came across as a refinement of that, but the K-5(imo) does feel petite in all respects. And so I'm hoping the grip will help with that. I have one on order, but it wasn't in just yet.
Well that's about it for now I guess.
So all that's left now is putting this thing to work now