Now, I'm not asking what is the best currently available release, but rather what release was the best when it came out - to give you an example I think the Executor set is awesome, although it's VHS only, so it definitely isn't the best currently available picture and sound quality, it was simply an awesome release in the VHS age.
Another example could be the 97SE VHS and LD release - I don't really like the version of the film presented but as movie releases go, it was great - top notch picture and sound quality for the formats they were released in, beautiful cover art and even the VHS release had bonus features, which was something I greatly appreciated at the time, as it was quite unusual.