Hi, Ian.
Welcome to the best Astronomy forum in Oz..
You will be very happy with a 10" dobsonian, be it new or a good 2nd hand one.
BTW, you have just come here in time to join us W.A.A.C.ers at our next viewing night on the W/E. We can assist with your choice of t'scope n gear. (in other words, we can help you spend your money).
PM me if you would like directions to the site.
Hope you can come along.
Regards, L.