BrianR, I think I would be very happy with a K10D or K200D, but I'll have to save up quite a while to get to the price for one of them, so when I get close to that, it will be worth considering whether I want to hold out for a K5 or K5ii.
I did read that the autofocus system is better in the K5ii, not so much in speed as in accurately adjusting for different lenses. Not an issue for me while I have no autofocus lenses, but, if I get one eventually, having a camera that might have difficulty with that lens could be a pain in the butt.
From what I can tell, now and then a body-only K-5 (I don't know about the ii-models) might go for somewhere between $200 and the $160 I have imagined as my price ceiling. Of course with lenses and lots of other bundled goodies, they are way more.
I'd probably hang onto the K110D for a while after an upgrade. In fact doing some comparison tests, using both during the same photo outing, for example, might help me understand better how to appreciate the upgrade!,
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I just ran across nomadking's post in this other thread <
https://www.pentaxforums.com/forums/6-pentax-dslr-discussion/324389-k10d-raw-...ml#post3689705 > that does seem to confirm the notion that the next real step up from the K10 is the K-5...except perhaps for diehard CCD sensor fans. They sound like people dedicated to a particular film back in the old days. I get it -- they know what they like and how to use it.