Whatever you do, use this site to find the best price.. Booko <http://www.booko.com.au>
I've found that it's normally a lot cheaper buying OS and getting shipped than buy at Borders, A&R or another Australian store.. eg.. WPF Unleashed.. UK - Book Depository Uk = $40 with free international shipping.. AUS - QBD, Dymocks = $59.95.. A&R = $77 Grant.