Welcome AmeriBrit
Welcome to FlyerTalk, AmeriBrit. It's a lively place, certainly today, but there's always space for more, it's good to see you here. So make yourself at home, and feel free to let us know how it all works out. I look forward to reading more from you.
I would only add one comment to the excellent suggestions made above: With KL on your doorstep, and an excellent regional network now on oneworld, this may be one local factor involved, in terms of both Avios earning and spending.
What I would do is list out what in the ideal world you'd like to achieve with your Avios/miles, how BA, MH or SQ could meet that ideal, and whether the earning opportunities make it feasible or not.