Mr. Newtownian, That is good advice, thankyou.
I have already purchased a Celestron SCT 8SE on a goto mount. I shopped around a little and spent $2,900.
I have a few 1.25" and 2" eyepieces and diagonals and filters.
I very much want to view via a 10", 12" and 16" Dob. I think its called "Aperture Fever". I only started Feb 09, but have had an interest in astronomy since the dinosouars. In the past I could never justify the financial outlay until recently.
I am seriously thinking of upgrading / adding to the armoury. I need some time in the field to help make a choice. I'm interested in astrophotography as well but not dabbling in that 'til I become a proficient observer. That is not going to happen for a few months when the clearer skiers of Brisbane's winter begin to prevail.