A few options to consider re stores:
www.bintel.com.au good after sales service with their own workshop and qualified technicians, so if anything goes wrong 99% of the time they can fix it there in the store
www.myastroshop.com.au often cheaper than Bintel (check though individual items an vary in price), the guy behind the shop front is an avid amateur astronomer and a great help, good service but I'm not sure if he has an after sales service or where he gets warranty work done.
www.andrewscom.com is probably the cheapest of the lot but generally only sell cartons, and are not a dedicated astronomy store.
eg. check out the price difference between the eq6 with Skyscan $1000 difference. But sometimes the cheapest price isn't the best price
