I have mentioned this resource previously in a couple of other posts but I thought I would give it its own thread. http://readingfaithfully.org/buildingasuttalibrary/
On this page you will find a two page PDF designed as a resource guide for people wanting to own a complete set of the Sutta Pitaka. So, big qualifier: It only covers the oldest parts of the canon, and I know not everyone would agree with where the distinction has been made. Still, I think for the majority of people who would benefit from a resource like this the line is not controversial.
I have chosen the books using three main criterion: accuracy, readability, and availability. I have also preferred paperback editions when available. Except in the case of the Dhammapada and the Handful of Leaves anthology, I have only included one edition per book. In the case of the first four Nikayas there is only one clear option anyway.
The Kawasaki's Jataka anthology is included even though it only includes the stories which are not considered canonical. This is the only exception on the list in this regard.
I have also included some good anthologies that I think are a useful way of entering into the main texts.
This is a recently updated version that now includes only the new complete Anguttara/Numerical Discourses and not the shorter anthology.
Obviously, this resource is not intended to be a complete bibliography of everything available. In fact, the purpose is to narrow possibilities so as to make the task of building a sutta library possible for the beginner/non-expert.
Thoughts and feedback are most welcome.