Yeah, forget the 80mm and get an 8" Dob. Unless you live under dark (mag 6+) skies, I see little point to an 80mm scope for visual astronomy.
Like Geoff, I used to own both a Dob (an 8") and the ED80, but the ED80 was not very useful due to its limited aperture. Not enough aperture for either resolution needed for planets or light gathering ability needed for deep sky. It would be a nice scope if used under dark skies, but when I make the effort to drive 100-300km to dark skies, I'm going to spend my time with the biggest baddest scope I've got, not the smallest. So the 8" won both in my light polluted backyard at home as well as under dark skies on w/e trips away from home.
Since then I sold the ED80 and got a 12" Dob, next to which the 8" Dob makes a great second grab-n-go scope that I use more often at home. (Don't ask me what the Mak's for. I'm still figuring that one out.
)