Sure!
I´m going to purchase my K-5 next month and I intend to keep my K20D for ever... I had capturing images from a brazilian woman politic for 3 months, last year, day-by-day, and must to say that K20D did an excellent job!! I had learned how to use flash more than 1/180 and how to calibrate camera to optimize images... Well, I can say that my K20D even limited in fps or undesirable grains over iso 800, beyond no so fast focus, it could take 41.000 pictures with any problem in the camera.
I hope to get little bit upgrade with K-5, of course, but my K20D got a kind of historical mark in my job life