My new 10" Dobsonian uses 2" lenses, but comes with a 1-1/4 adapter to use the “cheaper” lenses. The scope itself came with Plossl 25MM and 9MM lenses, in the 1-1/4" flavor. They seem to be of good quality.
Since I am probably going to want to buy a 6MM and a barlow (2 or 3x) is there an advantage of ditching the 1-1/4" and going in favor of the 2"? There is an obvious price difference between the two classes.
Help an amateur!