I will add one advantage of a refractor over a cat - i'd bet you don't have to worry about coatings as much. I've sent my C5 to Celestron twice over the past 20+ years to have it recoated. That was due to neglect from someone else the first time and due to heat & neglect on my part the second time. Having said that (knock on wood) my LX-6 is still pristine.
C5 V. C102: Any Advantage?
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