These look to be Queensland Scott # 84, 113 and Victoria 185 on the top line. Scott 169 (with a nice Geelong strike, my home town), 194, 172 and South Australia 58. I don't think there is anything too scarce there but a nice lot, nonetheless.
Yes, one man's triumph over popular criticism of the design. Without his strength of character, we would have had the run of the mill, countenance of some king or queen. Would not happen today, that evil democracy. would intervene.
Tholath, the Aussie Roo's are one of the most collectible Stamps on the market IMHO, try and find one in good shape on an eBay type auction and watch how many bidders these attract. As with any Stamps of the commonwealth, make sure to look for inverted or sideways watermarks and plate flaws.