As one of the editors and authors of the series, it's not surprising that I recommend the CCSS! But here I want to recommend the Verbum editions. Without doubt Verbum provides the best electronic format available for reading or consulting the Catholic Commentary on Sacred Scripture. The live links to Scripture, the Catechism, other magisterial documents, various translations, and other Scripture resources make it a breeze to use, not only on a computer, but on all kinds of devices. Verbum just offered me a complimentary set. But I already owned them all!