I am looking for a sleeping bag for...
I am looking for a sleeping bag for Australia, with a tempereture range of 10 degrees dowm to -10 degrees.
I have two Western Mountaineering sleeping bags & in my humble opinion, there is no better bag on the market. On the down side they are $$$. Depending on your usage, purchase a WM bag to get many years of comfort, warmth, & service. I have the Antelope & would highly recommend it for your intended purpose however you might have to layer up a wee bit for -10. Here's more information:
I agree with Jeff, I would get the Antelope for ranges of 10 degrees to -10. Western also does an overfill (and I believe its 3-4oz more for this model bag). Accordingly, this will lower the temp rating a few degrees (conservatively). I would look into that option if getting this bag for your situation.