Hey mate,
The LF 9, 12m combo will be perfect for around Adelaide and down south. Regarding West Lakes, I guess you are talking about the beach of West Lakes and not the lake itself. There are plenty of crew who kite that section of beach.
If you join up to the SAKSA facebook page, there are always crew spreading the word of where they are going to be kiting on any given day.
Cheers Croc