I think I would go with the Nikon d90. My k20d is back at pentax. If I didn't have so much in pentax would go with the Nikon. I would sell it all on eBay but there fees are so high. I had an ist dl, and k10d. I now have a k20d and k100d super. Out of all of them I like the results of the k20d the least. I have a DA* 50-135, f50 1.4, f 35-70, DA 50-200, A50 1.7, A50 2.0, f 70-210 and a sigma 24-60 ex. The k20d is at the Pentax Factory now. I get soft focus on all my lens except for the Sigma. I had Sigma adjust the lens for the body. Sigma is 5 miles from my house. They did it while I waited in the lobby. I set the auto focus adjustment at -10 for all lens and it still was front focusing. The sigma works with no adjustment. Now when the body comes back the sigma will probably back focus? I also wonder how long pentax will be making cameras with the poor market share that they have. Also what will happen to my DA lens when they go full frame and I up grade.