I upgraded from the K100D to the K200D and I have to say it's worth it. Not because of the 10MP sensor but it's even more feature-rich than the K100D. I especially like the self-cleaning sensor ( see at Pentax K200D reviews ) since I live in AZ where it's very dusty and keeping my sensor clean on the K100D was a huge chore. I plan on trip down the Rogue River in OR this summer so the weatherproofing should be very handy. But most of all I do seem to take a cleaner picture with this camera noticed that I do less PP'ing with these pictures. Excellent value for the money. Great camera for the beginner. Lots of excellent good quality lenses available for reasonable prices on Ebay. The only complaint I have is the viewfinder. Even with the 1.2x adapter I have a hard time manual focusing with my older lenses.