Hi All!
Thanks for everyone's input.
The results are:
Australian Sky and Space = 48.94%
Australian Sky and Telescope = 89.36%
Astronomy = 21.28%
Sky and Telescope = 21.28%
As you can see the Australian magazines are preferred over the American offerings, although these still attract a large audience (based on my small sample set).
I am also glad that this did not degenerate into a "mud-slinging" thread, however, if I were an Australian Sky and Space editor I would be interested in finding out why his/her publication is less popular than the other Australian publication.
I think I can now subscribe with confidence.
cheers,
DJDD