Thanks to all for the valuable information in this thread, I have been able to book for 2 our first ever first class booking. It will be SYD-SIN-LHR both on A380 and we couldn't be more excited.
One question if I may regarding the return leg which will be the same route, I'm wanting to do a few days stopover in SIN, so would it be advisable to book just to sin as soon as it's available and then add the SYD leg a few days later? Or do I wait a few days and hope I can get both on the same booking (I'm happy to pay extra in fees but am a little points poor so would prefer to do it for as few a points as possible)