Hi Dillsandwitch,
If you are still looking for the Sony, you might want to check out Myers:
http://www.myer.com.au/shop/mystore/...-wht-257166730
This is still cheaper than the Kobo Aura or Glo. I just bought an Aura from JB HiFi for $130, and you can get the Glo for $130 as well, I just asked the sales rep for the best price they could do.
I think the H20 will be available soon, it might already be at some of the JB HiFis, it's worth just calling around to your local stores to find out.