Here are some pics I've taken with the 80ED and my 6-year old DSLR. Only the Trifid nebula and Cent A galaxy was taken in the NEQ6 last night, the rest were taken with my old EQ5. I can definitely improve on these, I didn't take enough photos to stack. But as you can see, theres still a fair amount you can do with little equipment. I live only 25km from the CBD of Melbourne too so light pollution is a bit of a problem.
Anyways I think that’s enough writing for now. You already seem to have a good footing which is great. Hope this helps! Do let us know what you decide on