Hi Eze,
I am not the person to be giving advice on other scopes but I do have a 200mm (8") Skywatcher and think it is the greatest! And I love DSO,s.
As others have said, for DSO's aperture rules along with dark skies. But also you should consider, will you need to to move your scope around either just for setup or in the car to a viewing sight. I believe 10" scopes or more can be a bit of a handful.
Whatever you decide on I'm sure you will have a lot of fun.
