IMHO the 1967 team made the Elite Eight (although it wasn't called that back then) and that is the high water mark. The 1973 NIT Championship team is a very close second because of the way the tournaments were set up back then. There were 25 teams in the 1973 NCAA tournament and 16 in the 1973 NIT - and some of those 25 teams in the NCAA were from lesser conferences.

Personally the 1973 is my all time favorite VT sports moment(s) of any kind - absolutely breathtaking the way we won that title.