Jorden - image quality, especially on a high iso image grain perspective, is outstanding on all current DSLR bodies. I am confident that you could pick any one you want and have the image quality that you need. Now, other specific features can differ between camera models. You mention wanting a small, lightweight body. In which case the micro four thirds, sony NEX, and Sony SLT model's would be the best choice in achieving excellent IQ in a small, lightweight body. Of those, the Sony SLT uses A-Mount lenses, which are the most plentiful in variety, it also will have the fastest AF and the best video mode available. It is, though, the larger of the three, but still smaller than other DSLR's. The Rebel would be the next model larger worth looking at. Beyond that all other DSLR's will be much larger and heavier.