2012 Flights to Melbourne from Manchester

Hi

Im migrating to Australia next year and am therefore looking at booking a one way flight from Manchester, UK to Melbourne, Australia from mid March 2012 onwards.

Does anyone know the cheapest way of getting out there or if there is a best time to book!?!!?

I have already seen that Singapore Airlines seem cheapest up until the 21st and Emirates have good offers from mid April.. also there are cheaper carriers like Air Asia from London, but how good/bad is their service!? With Air Asia at least I can pay for extra baggage rather than havin to pay via the std excess baggage route as they allow super sizin but when you consider all the add ons includin food and drink on such a long haul flight.. im not sure it works out that much cheaper

Do i have any other options? Or.. . should I wait and see if there are further sale periods!?

Many thanks

Antony