As MEA has stated, the Longreach name is a historical reference to Qantas' Queensland roots, also meaning 'Long Reach', a reference to the aircraft's increased range over the B747-300.
Most -400s also carry an individual name, starting with 'The City of Canberra'. VH-OJI is actually named 'Longreach'!
Click for large version
Photo © Craig Murray
The three GE aircraft, VH-OEB, OEC and OED, are a Boeing 747-48E ex Asiana and 2 Boeing 747-4H6s ex Malaysia respectively. They will soon be joined by GE powered B747-438ERs.