Check out Bambo's 600, a list of deep-sky targets for southern observers:
http://www.iceinspace.com.au/forum/s...ad.php?t=45678
From this list you should see galaxies and nebulae down to at least 8th or 9th magnitude with an 8" Dob. That'll keep you busy for a while.
You will see a lot more if you leave the city or the suburbs and join other IISers at dark sky sites in the Blue Mountains, Mangrove Mountain, etc.
Cheers
Steffen.