what camera do i need pentax DL vs nikon d50

[Andre_L]

i been in photography for a few months and shoot with a s9000 and i am disapointed that i get to meny shots with blown out sky with this camera.i been looking at the pentax dl and the nikon d50 for the fact that these 2 cameras can have a lens i like to put on the camera. the lens is a sigma 28-300mm that comes for these 2 cameras.what camera is better?