This site is from Consumer Affairs in the USA. It compares the features of a range of hearing aids, some of which are not available in Australia. Users may find the reviews of the different brands helpful when deciding to choose what hearing aid to get.
These are some of the major brands currently offered in Australia. Oticon; Phonak; Unitron; Hansation; Starkey; Widex; Resound; Signia; Bernafon.
This is the link here: Consumer Affairs - USA