Hi,
I was about to say that it sounded like you had the NEQ6 Pro price from Bintel and the AZ-EQ6-GT price from Sirius (the AZ-EQ mount is always more expensive), but not so: you have the prices for NEQ6 Pro at both sites and you are basically correct!
Astro Pete's (they're in Bisbane, so basically local to you) has the NEQ6 Pro at $1695 (in stock), so that's even better:
http://www.astropetes.com.au/mounts.html
I don't understand the price differences. Sirius also has the AZ-EQ6-GT at $2718 compared to $2099 at Bintel and $1999 (currently on special) at Astro Pete's.