hey mate
well i use NAV2004 and i also live in Australia.
I've been using Norton products for a long time tho, not sure which one is the best except norton isn't that bad
a bit of a memory hog tho...
. Anyways whats the context of your problem? is NAV not doing something correctly etC?
EDIT: the best is always going to be different according to different users - its their own opinon
so its hard to definitly say which one is the best