19's may good and well fit, but they will definatley not pass an MOT (UK, presume AUS have something similar) so keep your standard ones ready nto change over for your MOT, my 15's bearley made it through my recent MOT to.
attached pic of mine at mo, its not lowered to, so if you have or decide to lower your car then this is another factor to look at as to the MOT side of things. hope this helps.