Well, factor the return postage / courier cost should the need arise back to Hong Kong against probably zero costs from an Aus. retailer and see what the savings may be from buying a grey import.
If you really are so worried about the warranty on the product, maybe another brand that doesn't have so may reliability problems may attract you more.
In reality, with the Aus. peso at a strong point at the moment, firm price combating policies in place by local distributors and already some well known grey importers charging more than local retailers, one really has to ask the question as to why you would bother importing -----