Ok, back again with the same question. Summary, camera will be used for everything, but mostly aviation and automotive photography. Here is what I'm comparing. For what I need in my price range these 4 made it to my "Final 4". Pentax K200D with 18-55 and 50-200 ($750 after rebates) Nikon D40 with 18-55 VR and 55-200 VR ($600-$650) Olympus E-510 14-42 and 40-150 ($550) Canon EOS 400D with 18-55 and 55-200 IS ($850) My Pros Cons are as goes. Pentax... Pros, image quality, weather sealed, IS in body, body fits in my hands well, software looks nice, sensor cleaning Cons, Rechargeable battery pack would require the purchase of NiHM AAs and charger, higher price than other options. Nikon Pros, image quality, and high ISO performance, rather affordable on my budget. Cons, lack of features, lens selection, in body IS makes lenses more expensive, no sensor cleaning Olympus Pros, image quality, superior kit lenses, in body IS, selection of all available 4/3 lenses past and present, most affordable on the list, sensor cleaning Cons, questionable highlight roll-off and shadow detail, dynamic said to be behind the pack. Canon Pros, image quality, high ISO performance, wide selection of canon and 3rd party lenses Cons, PRICE on my budget, out of body IS means present and future lens additions with IS will be expensive, sensor cleaning unit questionable at best Any other comments, things to add to the pros/cons list of each camera etc are much appreciated.