Charles,
I have a normal 10" dob and a friend who has the CPC you are interested in. Personally, you can see more deep space objects in the dob than you can in the CPC. If you were in no rush, can always meet up and you can see for yourself before buying.
If you wanted to go the other way for long exposure photography, the CPC has a relatively cheap upgrade path than the 10" dob does.
Joel
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