This is a near duplicate of a post I made to someone else on this forum. I assume you are thinking of a DSLR.
I am an advanced amateur photographer who shoots landscapes on my vacations with a Sony Alpha 350. I learned digital photography on a Sony superzoom, so I decided to stay with the system. The 350 has a great set of features for landscape photography including 14 megapixels, the best live view going, a tilting LCD, preset modes for landscape and sunset, light weight, steady shot in the camera, 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 one extensive review comparing it to the Nikon 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 at or 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, but all top lenses do.
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 beautiful 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. See below.
Other cameras may do as well, but the the 350 is hard to beat for the traveling amateur landscape photographer. My bias.