"Toohey's Old Dark Ale, one of the best brews from the any of large Aussie brewers." HA!!!!
Average at best. Without a shadow of a doubt, Southwark Old Stout is the best stout on the market in Australia from a large foreign owned brewery. Noting that both SOS and TODA are made by Kirin, a Japanese business.
If you want to support Australian - go Coopers (Sparkling Ale - fantastic, Stout - ok, on par with TODA (and I'm being bloody generous here) but at least the money stays in Aus (SA in particular)) or any number of boutique breweries.