None of this bleating about narrow baffle tubes affects the OP who is interested in a C9.25, which Celestron lists as having a 46mm baffle tube. IMO the C9.25 absolutely benefits from 2" eyepieces for DSO viewing.
As for the C8...for the casual observer, like me....I've not noticed the vignetting when out pushing the FOV with my Pentax XW40, which has about the widest field stop you can get. I'm sure it's there just as theory predicts, and more experienced observers could point it out, be bothered/unhappy about it, etc...but when the subject is in the centre of the FOV and extends toward the edges, maybe I'm just distracted?
