I was initially concerned about the IQ of a M4.3 for what I shoot so I satisfied myself that it was adequate for me before starting to sell off my Nikon stuff. I bought the best lenses available for the body; my reasoning being that it is silly to get a fine sensor and strain the images through a Coke bottle bottom These are two 100% crops of pictures taken yesterday walking around DC in pretty bad shooting conditions, high sun, no shade to speak of with 35-100 2.8 Panasonic (70-200 equivalent) at 2.8 and 100 and 75 mm 1.8 Olympus taken at 2.8. Opened in LR 5 with no additional work besides cropping and taken to PS to add text these are the originals. Sharpness and color rendition good enough for street work for me. Better dynamic range than my D700 and infinitely easier to carry for a day.