I have found the lens and camera reviews helpful. I recently upgraded from my trusty old K100DS to a K5. After studying the reviews and sample photos (as well as experimenting with some RAW images that others have posted), I determined that the K5 is all I needed, and there was no need for me to spend more money on a more current body. I'm extremely satisfied with the K5! It has not made me a better photographer, but has made it easier to get the results I envision when I take the photos. The review is here:
Pentax K-5 - Pentax K-mount DSLRs - Pentax Camera Reviews and Specifications It would be nice to have the ebook guide to go with my K5.
Thanks to all those who have taken the time to share their reviews and experiences with their equipment.
-Joe-