Some people asked for a quick comparison of the K-r versus K-5, here's a few key points (which some of you probably already know on paper), along with some other random musings:
1) Battery life is tons better than the K-r. I was worried about needing more than 1 spare battery for my K-r, having to charge one battery after one sunset shoot, the battery would indicate that it was drained. I ended up getting 5 spares for the K-r, it's a long story. I just charged the Pentax battery for the first time since I got it, that's about 3-4 times the number of shoots I squeezed out of it... Maybe even 5. And I'm told the Divipower one lasts even longer.
2) Focusing is a lot snappier than the K-r. Don't get me wrong, the K-r is great, but the K-5 is better, and I find it more trustworthy than the K-r's focusing at least for cats.
3) 100% and larger, brighter viewfinder - it's a small point but it does make a difference.
4) Better gradations, i.e. no banding; also greater resistance to banding in post. This was a rather large issue for me - if I tweaked the contrast just a bit harsher you'd get happy bands in the sky. Naturally this is a smaller issue than it sounds, but it makes a difference to me - saves me the trouble of smoothening out the banding when it happens.
5) Marginally better detail - useful for landscapes.
6) One-stop better ISO, thereabouts. I would shoot confidently with ISO1600 with the K-r (we've come a long way since the days of the K100D, I must say), but I do so confidently at ISO3200 for the K-5.
7) Better layouts, etc, blah blah blah, we already know that.
8) I haven't had a chance to test out the electronic level very extensively, but suffice to say I think it's not quite accurate in vertical format... I'm not sure if it works, but I'm quite sure it's off, so I'm doing it by eye for now despite having an electronic level in camera. Wonder if sending it in for fixing would take a long time - anyone knows?