Had institutions had hearts, the Mahabharata would certainly be BORI's! A giant research project undertaken by the BORI since its inception was The Critical Edition of Mahabharata. Edited by the likes of V. S. Sukhtankar, S. K. Belvalkar, S. K. De, Prof. Dr. R. N. Dandekar, the Critical Edition enjoys the status of one of the most prestigious and appreciated editorial work of the world. This edition was prepared with painstaking efforts of scholars for about five decades consulting 1,259 manuscripts. A comprehensive Prolegomena ( Vol. I ), written by V. S. Sukhtankar, brings out the material and methodology of the project.
The completed Critical Edition of the Mahabharata ( 18 Parvan- s; 89000+ verses in the Constituted Text, and an elaborate Critical Apparatus; 19 Volumes: No. of pages: 15000+ demi-quarto size ) was released on September 22, 1966 at the hands of Dr. Sarvapalli Radhakrishnan, the then President of India.
Currently reading since a few months - few chapters at a time with references of the Gita press version. Reading this alongside Gita press and having a personal critical analysis is a bit of an effort but worth every bit. I am also picking a few points from Ganguli's edition though BORI edition is sufficient. The institute has done a phenomenal work of researching and putting it all together.
There is no story past or present that matches the depth of this work.