hi

im in the process of researching too here are some that helped me they are FREE
rpdata lets you do a free suburb report
http://www.homepriceguide.com.au   give you auction results and recent sales
http://www.hotspotting.com.au  for info state of market etc
http://renos.com.au/   
Each local council website has a statistical portrait of areas – usually very informative
http://www.domain.com.au    also does a suburb profile

good luck