as has already been said there is no one scope does all situation! Deep sky objects require decent aperature and pin point tracking as the objects that you are photographing are generally very faint.
On the other hand having a planetary rig you want massive focal lengths which "zooms" in so you can get details.
If you are looking to use a DSLR in Darwin you will very quickly get sick of the thermal noise produced by the sensor
(im from darwin lived there for 20+ years).