i was just looking at a nesco, they look awessome for the money. I dont know if they have em in 240 volts for the Aussie supply though. I think if thaey have a 240 volt one that will be the one ill get.
http://www.nesco.com/category_449f7f01f1ea/subcategory_39febe0b9343/product_d633d5c130a1/session_79f7f140913c/