I fly four or five times a year to Sydney (sadly just economy, but usually flexible/y-class). With BA I've got up to Silver status, but am underwhelmed by their LHR lounge. Also, I never seem to be able to do anything useful with their points. Qantas have just opened up a new lounge in T3 LHR, so considering that (although I've not seen it).

I'm wondering if it would be better to build up points with another airline? I don't particularly like BA economy seats or food either.