As I have only just arrived in Adelaide and currently have no kit

I am thinking about either buying a small amount of really cheap kit to get me through to the end of the year or maybe buying some new kit if it is the same size as the kit that needs replacing anyway.
Not being aware of the conditions you have a tendency to get over here I was hoping to get an idea of the size of board and sail people have a tendency to use the most; an indication of where you sail, winter/summer and sailor size

would also be useful.
I appreciate that this is a bit of an open question (depends on the conditions) but I am sure that most people have one set up that they end up using more than any other; i certainly did in the UK.
Cheers
Arlo