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Hey Ian
Well done on getting out there. Imagine Moree would have sopme nice skies even when the Moon is about.
One small point to clarify. A dob is a newtonian. The Newtonian is a type of scope (paraboloic primary mirror with a flat angled secondary) while the dob refers to the type of mount. While there are some example of scopes other than Newts being mounted on a dob mount, thes are very rare and all commercial dobs are newts!
Good to know you are getting use out of your scope but if you go to a 10" or 12" you will really notice the difference.
If you are looking at a dob, apeture is the big thing. IMHO there is not much difference optically to choose between the major brands of dobs (GSO, Skywatcher, Saxon and Meade Lightbridge) The differences are in price and accessories. Obviously if you want to go for tracking or a full Go To that will set you back more and you may have to sacrifice aperture for that convenience.
Malcolm
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