The lens is more important than the camera, thats what makes the biggest difference. If you've got manual control of exposure then I find that trying to photograph the light is the way to go. Any given composition can change dramatically with the light, so I stand back a bit, underexpose a little, as definition in the sky sets the mood for me, and then crop to get the best composition afterwards. If you can use the filters and such on site its much better than messing about on the computer after. To get the light you need some shadow, and you have to be there at the right time .