Howdy!
An 8 or 10inch Dob is what you want. Aperture rules for visual observing of deep space objects. Closely followed by optical quality, eg; its no good having a 12inch Dob if all the stars are streaks of light, not points of light. Id probably look at the Skywatcher line of Dobs, but the are all probably made in the same factory in good ol' China anyway.
