If you want to do planetary imaging or even visual then cool down time is important. A compromise would be a C11 which could be mounted on a G11, EQ6 or an alt az mount (CPC11) and can be moved around. A good idea would be to check what your local seeing conditions are like. If they are good then a bigger scope is best. If seeing is consistently poor then a bigger scope may not be an advantage, An 8" scope, newtonian , sct or mak is still an 8" scope
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