building a Lovecraft library

[Richard--W]

I still have the paperbacks I bought forty years ago. It is time I upgraded my Lovecraft library. I know there are many different, even competitive editions that collect the same stories, but I want the most accurate and complete editions, preferably hardcovers.

Which editions should I buy?
Any recommendations here?
Include links to where they can be bought if you can.

Many thanks.

Richard