Not so much of a burger fan, apart from my own home made ones. But what I do recommend from the Oz burgers place are the hot roast beef rolls. Beef is cooked in a in a rich gravy that soaks in to the roll with caramelized onions and a sprinkle of ground black pepper n salt. Think the cost is 130b.
A word of warning they can be slightly messy to eat, the gravy juice will ooze out as you tuck in. Not the best look if it lands on your shirt on the way out for the evening. So better to eat as late night munchies on the way home.