I have looked at Whitcoulls also and has been said the prices are all over the price, and a lack of Si Fi books and what else there is, is pretty much junk. Also I have an iriver Story, which is so much better then the Kobo Whitcoulls sell, why they did not sell the iriver Story also here I cannot understand. It's made for the asian market, and we are part of that market.
But guess it's the price point, as the iriver Story is about twice the Kobo price, but well work it. It's so much better.
Anyway the trouble with ebooks is they are Geo restricted, so limits the choice of books you can buy, so we maybe stuck with Whitcoulls, just hope their selection improves.
The website I use is:
http://www.ebooks.com/
The great thing about this site, is it tells you if you can buy this, or not. Been caught out by some sites, bought the odd book only to find when I pay for it, it got Geo restrictions.