I'm quite found of wine and have familiarised myself with the odd Aussie winery in my time.

Mrs hates Chardy though so less help with that sorry.
There's an endless choice of boutique wineries from Aus however getting their stuff over here is the problem.
Personally I'd avoid anything from the supermarket not because it wouldn't be good but because 1. He may have already seen it and 2. The stock may be transient and you'll never be able to get it again should he absolutely love it.
Find a local wine merchant who loves his job (who wouldn't) and get their recommendations.
Oh and an obtuse recommendation, Aussie sparkling reds are fantastic and wonderful special occasion drinks.