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Looking at what you have already I wonder why this question? FWIW I have just researched buying a new scope and considered the C9.25, it has a flatter field that suits it better to photographic work than the C11 but less light grasp, I did not really consider an 11 due to size/weight limits so I cannot say much more. For planetary work you want the greatest focal length (for magnification without having to resort to exotic eyepieces) and smallest central obstruction possible (or none) for best contrast. Thus a long FL APO refractor or a MAK are best...
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