You will find two main brands of Rabbit food in Supermarkets in Australia - Peters, and Lovatts.  Both have plain pellets, and also a "Mix" for rabbits and guinea pigs.  The mix should be avoided (why ?  see here), but both brands of plain pellets are fine.
We prefer the Peters brand, as the fibre content is higher and the protein content lower, but both are acceptable.  This in no way is an endorsement of either brand.