There was once upon a time when Adelaide had an all-male presenting duo (Rob Kelvin and Kevin Crease) and Perth an all-female presenting duo (Dixie Marshall and Sonia Vinci).
From what I can remember, Kelvin and Crease did well to last as long as they did, considering they were up against the top-rating duo of Jane Doyle and Graeme Goodings (and later John Riddell) on Seven. Sadly, Crease passed away in April 2007 after being diagnosed with cancer; Kelvin then presented solo in the interim until ex-Ten newsreader Kelly Nestor joined him at the desk in October that year.
Marshall and Vinci didn’t last long in the noughties; they served from 2003-08 I think. They were never going to last long especially as Rick and Sue on Seven were the runaway ratings leaders in the west (and still are today).