Brisbane Lizards (as in 'Frilled neck lizards).
.only because then they could be called the "Brissie Lizzie's"
or better yet.
Brisbane Red-Bellies - could start a new tradition of a Brisbane Haka where the players (and/or fans) flash beer bellies painted with red war paint.
Seriously though I think "Brisbane Redbacks" could work.
Methinks Brisbanites could own that accoladeI like the Redbacks but we have to at least make it hard for the southerners to make fun of us. We will be known as the Brisbane rednecks in about 0.004 sec after that is announced.