try before you buy..do you have a local astronomy club? Otherwise I am fairly sure there is a Bundaberg astronomy club and if you find out when they have observing nights you should be able to get up there and look through some 10 inch Newts or Dobs that will give you a good idea what to expect
if you can't wait, I'm with Louie, get the 10 inch it will keep you going a long time
I dont know how many supernovas Bob Evans found with his 10 inch dob before he upgraded to 16 inches but I'm sure it was a heck of a lot..and you dont find supernovas without being able to see galaxies.
