Generally Canon DSLR camera`s now come in 3 versions, Crop frame, Full frame and Mirrorless. Disregard Mirrorless as they are too expensive, Next we have the Full frame cameras such as the 6D and 5D along with the 1DX, Again disregard the 1DX series on price, The full frame camera 6D and 5D is in my opinion the most versatile, in as much as it is a general allrounder capable of portrait's to landscaped to wildlife. As the image has not been cropped it then makes it better quality if cropped again using picture editing software. The last version is the crop sensor cameras like the 7D and most o