First, congrats! That's exciting.
Second, I wore only one hearing aid (back when it helped) and while I didn't really have any basis of comparison, that worked great. I had to swivel my head around a bit to figure out where a sound was coming from, but in terms of communication etc., one really did the trick.
Now, in terms of advice, I'm at a bit of a disadvantage because I haven't worn a hearing aid for over 15 years. And the field has developed a LOT since then.
The fact that your loss is in the high frequencies is good. Hearing aids can make a HUGE, life-changing difference there. (Do you know your db loss?)
As for the salesmanship, I experienced that with cochlear implants (HUGE moneymakers for docs) but it was more laid-back at my ENT's 15+ years ago. I don't know if that's a function of time or of my ENT.
I think you can just get a lot of info, refuse to make any decisions right away, and do research etc.
Oh one other thing I know from my own recent experience and helping others, you should be able to try a variety of hearing aids before deciding. You have to pay for the earmold (the part that goes in your ear) but you should be able to try them free. Possible different in Oz.
Oh also if you tell me more about the db loss I can tell you more about what general kind of hearing aid is indicated (behind the ear, in the ear, etc.)