[Darth Wader (Wade)]

Hi all
I got my beloved Skywatcher 70x900 refractor for Christmas last year and I've gotten every penny worth out of it so far, getting it out every time the sky is clear and moonless. I've really gotten into this hobby over the last 6 months and now I'm itching for a bigger scope. I don't track objects and I'm not imaging yet, I'm more of a point-and-go stargazer at present so I thought a dob would be the best thing for me.
I've checked out the Andrews Communications website and seen that a decent 10" collapsible Skywatcher can be had for $799, with the 8" version at a mere $399. I'm leaning toward the 8" based purely on pricing, but if I could manage to scrape together the remaining $400 I'd easily go for the 10". What I want to know is whether or not there is much of noteable difference in viewing between the 8" and 10" - basically, is it worth me spending the extra $400 on 2 inches of aperture, or is there more to it than that. At the moment I use my scope only in my backyard but I would use a dob at dark sky sites occassionally when I join my local Astro club next month.
Cheers
Wade