LOL - I'm with QF in the UK and was flying LH out of Australia before that (up on transfer from Aus).
To be honest Muizenberg it depends on what you're looking for. Yes, you're probably more likely to be promoted quickly within Qantas than BA. To give you some idea, there are 2 people who started flying with Qantas when the base first opened and have been promoted to CSM (like your CSD) in less than 2 years. However, you are going to fly less routes and you are going to earn less money.
But if you're looking for a smaller base and probably more flexibility with rostering then again you'll probably get more of that with Qantas.
BA, however, is often seen as the pinnacle of LH flying and you guys do seem to have very good conditions, so I can definately see the appeal.