um well i dont know anything about diagnostic radiography. but my dad works in intensive care in blacktown hospital and concord hospital. he really doesnt like blacktown, but he does like concord hospital and enjoys working there. so that might be an idea.
umm oh both my parents used to work at westmead hospital too. they had no problems with it, liked working there, etc. personally i think it has a creepy depressing atmosphere but then i dont work there.
i dont know anything about other hospitals around sydney though.