since you're used to stripping your ebooks, amazon has a wide range of ebooks even for readers who are from outside the US. it's the one i've bought most my books from.
some publishers impose geographical restrictions on their books preventing amazon from selling those books to certain regions (read outside the US) but amazon don't have an issue about international addresses. so even if you are from China or from Argentina, if the ebook you want to buy is not restricted by the publisher, amazon will sell it to you.
to my dismay, however, B&N don't. as far as i can tell most ebooks from them are restricted to the US and Canada, even if the publisher sells it elsewhere. (i haven't found one that's available to the rest of the world)
waterstones, i also have a problem with. i can't register for instance because i'm not from one of the countries in the roll-down list, china is there but nevertheless the list of countries they can sell to is severely limited.
their loss....
welcome to mobileread!