my 2c
I wouldnt have that pic. To me it is saying: This is our club and these are the cars in it. I assume you'll be wanting to use the banner for years to some, and members come and go, and cars are bought and sold.
I'd prefer a more stylized design like some massive tailights, merged with a canberra feature such as the parliament house flag, merged with text that stands out.
As for the text, i would forget about trying to do the SAU thing... I think it's too distracting...better to make it easy to read and obvious what the name is.
Just have something like
SKYLINES AUSTRALIA
A.C.T.
and maybe the website somewhere.