For landscape and portraiture I would strongly recommend full frame, thus the 5D. Image quality is wonderful as earlier stated, buy my main reason is how my lenses work. For your purposes, assuming video isn't the driving factor, I rarely use my crop bodies compared to full frame (FF). I started with the original Rebel, and when it quit working after 8 years bought a 60D, which I shot today, so I am not knocking the 60D. I have a 5D, 40D, 60D and 6D, one crop and one full frame at each home. If I am doing general shooting, I always go for the FF since I prefer the standard effective focal length. A portrait with an 85mm and FF is better for me than the 136mm equivalent on my crop bodies. For birds in flight (BIF) I will usually go with my 6D rather than the 60D, depending on the size of the bird. If shooting raptors with a 400mm f/5.6 handheld, I will go for the FF. Smaller birds, then the crop body is likely better. My zooms are 24-105mm f/4 IS, 70-200mm f4 IS and f/2.8 IS II, and usually the FF is preferable to the 1.6X focal length crop factor for general shooting on a vacation, hiking or just walking around a park. Wherever I am, I can grab a FF or crop, but it always comes down to how I want the lens to play, not image quality. When I am on a vacation in the car, I take everything, and have at least three bodies with mounted lenses to be ready for whatever pops up. Neither of my FF have built-in flash, so if I need on-camera flash the choice is obvious.
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