As much as I love Breakfast at Tiffany's, I don't want to rebuy it just to get The Nun's Story. Rather get one of Audrey's other Paramount movies: Roman Holiday, Sabrina, War and Peace, Funny Face, even the dire Paris When It Sizzles that isn't already on Region A Blu-ray.
Or some Audrey Hepburn two film editions:
Sabrina/The Nun's Story
Roman Holiday/Wait Until Dark
She was Oscar nominated for all of these roles (and won for Roman Holiday).
When The Bourne Trilogy films were issued on separate discs and not in the box set, each disc had Blu-ray on one side and the DVD version on the other. Those are the ones I bought.