I am a photographer who shoots landscapes on my vacations with a Sony Alpha 350. It has a great set of features for landscape photography including 14 megapixels, the best live view going, an articulating LCD, preset modes for landscape and sunset, light weight, D-range optimizing, and so on. I read a lot of comparative reviews on it, and it matches or exceeds most everything in its category with a couple concerns. For a review comparing it to the D300 and others cameras see:http://www.epinions.com/review/Sony_Alp ... 3767543428
The concerns are mainly these: First, it does it best work at ISO under 800. This is seldom a problem for landscape photographers who typically work in light suitable for lower ISO. Second, the sensor needs some good glass to provide the resolution for its 14 megapixels. Sony has a series of Zeiss lenses that do the job and then some. I have had experience with Zeiss lenses since the film days. I realize that this is subjective, but those lenses ARE better than the competition. The colors and contrast they produce are often visually stunning. Yes, they cost.
As for preset modes, I had an experience that taught me their value. I was in Arches National Park near sunset on a stormy day when the sun appeared briefly below the clouds, providing a grand sunset. There was little time, so I set up the tripod, set the camera on sunset mode, and shot away. The preset provided images that may be better than if I had set the camera myself. The colors from the Zeiss lens were grand.
Other cameras may do as well, but the the 350 is hard to beat for the traveling landscape photographer.