I suppose it depends on what you mean by the 'world of macro photography.' Static 'still-life' or wildlife, etc? Macro means large and usually refers to life-size or greater (at the film-plane in the camera) but in general use means close-up. Many wildlife subjects, such as butterflies, dragonflies, etc., don't need the closest focus distance on the lens but do benefit from the optical corrections designed into macro lenses. All of the lenses you've mentioned are fine as far as quality of the image goes.
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