Optus has reduced there prices, decent deal all models at the same price but 128gb is out of stock but may be able to find some stock in store, $70pm with 3gb or $80pm with $8gb 24m contract, 6+ is $80 & $87
Further $10 off pm if you have Optus broadband
Samsung galaxy s6 edge same price $70/$80 but only 16gb/64gb
Better option is to go on $40 10gb sim only plan & buy the phone outright if you can find a good price
My 6s 64gb plan is the cheaper than that.