A wonderful resource for studying the Buddhist texts is SuttaCentral. The Online Sutta Correspondence Project has a full collection of Pali texts with handy PDFs available for download. In addition to the PDF version of the canon, SuttaCentral offers for download a cross-reference cheat sheet that I’ve found handy for finding a given sutta within the Pali Text Society’s volumes. For example MN 2, Sabbasava, is located in the PTS MN I 6. From the website:
This facility enables one to identify the Chinese, Tibetan, and Sanskrit “parallels” or “counterparts” to the suttas of the four main Pali Nikayas – or vice versa. It is designed for those whose interest in the Early Buddhist discourses extends beyond the limits of the Pali Sutta-piṭaka to include the extensive corresponding materials found elsewhere: the Agamas and individual sutras preserved in Chinese, the occasional sutra translations contained in the Tibetan Kanjur, and the numerous published fragments of sutras in Sanskrit and related languages. It is an up-dated and revised successor to Akanuma’s Comparative Catalogue of Chinese Agamas & Pali Nikayas (1929), and is the natural starting point in navigating around this vast mass of textual material.
As well as showing the correspondences as described above, Sutta Central allows one to access the texts directly in their original language (Pali, Chinese, etc.) and, where available, in modern language translation (e.g., English, French, German, Spanish).