I'm not sure where to post this, so sorry if this is not the appropriate place...

I am moving to London next month.

I currently have:
QANTAS Gold (0 current SCs, reassessment date 28 Feb 2013)
Velocity Platinum (70 current SCs, review date 10 Dec 2012)

Before I officially reside in the UK I will have the following business class flights:
1 x SYD-LHR
1 x LHR-SYD
1 x OOL or BNE-LHR

Once I am in the UK I will be travelling economy class within Europe mainly to France, Italy, Spain and Germany.

I will also have at least 1 x LHR-BNE-LHR flight per year in business class.

Any guidance would be GREATLY appreciated, can I stay with Qantas/Velocity and will another airline status match or should I change to another FF program? I am incredibly confused as to what is going to give me the most bang for my buck! I need to decide ASAP because I need to book my first SYD-LHR-SYD trip.

TIA!